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1
Mappings
1
Inheritance
5
Pathophys.
15
Phenotypes
7
Pathograph
2
Genes
5
Medical Actions
2
Subtypes
1
References
1
Deep Research
🏷

Classifications

Harrison's Chapter
DERMATOLOGY GENETICS_ENVIRONMENT_DISEASE ONCOLOGY_HEMATOLOGY
🔗

Mappings

MONDO
MONDO:0010002 Rothmund-Thomson syndrome
skos:exactMatch MONDO
Primary MONDO disease identifier for this Rothmund-Thomson syndrome entry.
👪

Inheritance

1
Autosomal recessive
Show evidence (2 references)
PMID:10319867 SUPPORT Human Clinical
"Rothmund-Thomson syndrome (RTS; also known as poikiloderma congenitale) is a rare, autosomal recessive genetic disorder"
Confirms autosomal recessive inheritance of RTS.
PMID:31303264 SUPPORT Human Clinical
"Rothmund-Thomson syndrome (RTS) is an autosomal-recessive disorder characterized by poikiloderma, sparse hair, short stature, and skeletal anomalies."
Confirms autosomal recessive inheritance for both molecular forms of RTS.

Subtypes

2
RTS Type 1 (ANAPC1-related)
RTS type 1 is associated with juvenile cataracts and is caused by biallelic mutations in ANAPC1, a scaffold subunit of the anaphase-promoting complex/cyclosome (APC/C). It shares the core poikiloderma, sparse hair, short stature, and skeletal phenotype but is distinguished clinically by the presence of juvenile cataracts.
RTS Type 2 (RECQL4-related)
RTS type 2 is defined by biallelic mutations in RECQL4, encoding a RecQ DNA helicase. It is characterized by skeletal anomalies and a markedly increased risk of cancer, especially osteosarcoma. Truncating RECQL4 mutations are particularly associated with osteosarcoma risk.

Pathophysiology

5
RECQL4 DNA Helicase Deficiency
Biallelic loss-of-function mutations in RECQL4 cause loss of a RecQ-family DNA helicase that unwinds double-stranded DNA into single strands. RECQL4 is one of the human RecQ helicases (alongside WRN and BLM, mutated in Werner and Bloom syndromes) and functions in DNA replication and repair. Its deficiency underlies RTS type 2.
fibroblast CL:0000057
RECQL4 hgnc:9949
RecQ DNA helicase-dependent DNA replication GO:0006260 ↓ DECREASED
Show evidence (2 references)
PMID:10319867 SUPPORT Human Clinical
"we report that three RTS patients carried two types of compound heterozygous mutations in RECQL4"
Confirms biallelic RECQL4 mutations as a molecular cause of RTS.
PMID:10319867 SUPPORT Human Clinical
"homologues of Escherichia coli RecQ, which encodes a DNA helicase that unwinds double-stranded DNA into single-stranded DNAs"
Establishes RECQL4 as a RecQ-family DNA helicase that unwinds duplex DNA.
Impaired DNA Replication and Repair
RECQL4 deficiency compromises DNA replication and repair. Both RECQL4 and the APC/C (deficient in RTS type 1) are involved in DNA repair and replication, providing a possible mechanistic link between the two RTS types.
DNA replication GO:0006260 ⚠ ABNORMAL DNA repair GO:0006281 ↓ DECREASED
Show evidence (1 reference)
PMID:31303264 SUPPORT Human Clinical
"suggest a possible link between the APC/C and RECQL4 helicase because both proteins are involved in DNA repair and replication"
Both RTS-associated proteins function in DNA repair and replication, supporting impaired replication/repair as a shared mechanism.
ANAPC1 Anaphase-Promoting Complex Deficiency
Biallelic ANAPC1 mutations reduce levels of a scaffold subunit of the anaphase-promoting complex/cyclosome (APC/C). A deep intronic splicing mutation activates a 95 bp pseudoexon, producing transcripts with premature termination codons subject to nonsense-mediated decay, decreased ANAPC1 protein, and prolongation of interphase. APC/C deficiency causes RTS type 1 and is associated with juvenile cataracts.
fibroblast CL:0000057
ANAPC1 hgnc:19988
anaphase-promoting complex-dependent catabolic process GO:0031145 ↓ DECREASED
Show evidence (2 references)
PMID:31303264 SUPPORT Human Clinical
"identified a deep intronic splicing mutation of the ANAPC1 gene, a component of the anaphase-promoting complex/cyclosome (APC/C), in all affected individuals"
Confirms ANAPC1 (APC/C component) mutations as the cause of RTS type 1.
PMID:31303264 SUPPORT In Vitro
"the intronic mutation causes the activation of a 95 bp pseudoexon, leading to mRNAs with premature termination codons and nonsense-mediated decay, decreased ANAPC1 protein levels, and prolongation of interphase"
Fibroblast studies demonstrate the molecular consequence of the ANAPC1 mutation: pseudoexon activation, NMD, reduced protein, and prolonged interphase.
Genomic Instability and Chromosomal Rearrangements
Cells from RTS patients show genomic instability often associated with chromosomal rearrangements that cause acquired somatic mosaicism. This instability is the proximate driver of the cancer predisposition, particularly osteosarcoma, that characterizes RTS type 2.
osteoblast CL:0000062
double-strand break repair via homologous recombination GO:0000724 ↓ DECREASED
Show evidence (1 reference)
PMID:10319867 SUPPORT Human Clinical
"Cytogenetic studies indicate that cells from affected patients show genomic instability often associated with chromosomal rearrangements causing an acquired somatic mosaicism."
Confirms genomic instability and chromosomal rearrangements in RTS patient cells.
Osteosarcoma Predisposition
RTS, especially type 2 with truncating RECQL4 mutations, carries a markedly increased risk of osteosarcoma. Osteosarcoma incidence is essentially zero in truncating-mutation-negative patients but elevated in those carrying truncating RECQL4 mutations.
osteoblast CL:0000062
Show evidence (1 reference)
PMID:12734318 SUPPORT Human Clinical
"Mutations predicted to result in the loss of RECQL4 protein function occurred in approximately two-thirds of RTS patients and are associated with risk of osteosarcoma."
Truncating RECQL4 mutations are associated with osteosarcoma risk in RTS.

Pathograph

Use the checkboxes to hide or show graph categories. Hover nodes for evidence and cross-linked metadata.
Pathograph: causal mechanism network for Rothmund-Thomson Syndrome Interactive directed graph showing how pathophysiology mechanisms, phenotypes, genetic factors and variants, experimental models, environmental triggers, and treatments relate through causal and linked edges.

Phenotypes

15
Digestive 1
Gastrointestinal Abnormalities OCCASIONAL Abnormality of the gastrointestinal tract HP:0011024
Show evidence (1 reference)
PMID:11471165 SUPPORT Human Clinical
"seven had gastrointestinal findings (17%)"
Documents gastrointestinal findings in 17% (7/41) of an RTS cohort, supporting an occasional frequency.
Eye 1
Juvenile Cataracts Cataract HP:0000518
Show evidence (2 references)
PMID:10319867 SUPPORT Human Clinical
"characterized by abnormalities in skin and skeleton, juvenile cataracts, premature ageing and a predisposition to neoplasia"
Juvenile cataracts are a defining feature of RTS.
PMID:31303264 SUPPORT Human Clinical
"the genetic basis of RTS type 1, which is associated with juvenile cataracts"
Associates juvenile cataracts specifically with RTS type 1 (ANAPC1).
Head and Neck 2
Sparse Scalp Hair Sparse scalp hair HP:0002209
Show evidence (1 reference)
PMID:31303264 SUPPORT Human Clinical
"Rothmund-Thomson syndrome (RTS) is an autosomal-recessive disorder characterized by poikiloderma, sparse hair, short stature, and skeletal anomalies."
Sparse hair is listed as a defining feature of RTS.
Dental Abnormalities Abnormality of the dentition HP:0000164
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"skeletal and dental abnormalities"
GeneReviews lists dental abnormalities among the characteristic clinical features of RTS.
Integument 3
Poikiloderma VERY_FREQUENT Poikiloderma HP:0001029
Course: PROGRESSIVE
Show evidence (1 reference)
PMID:11471165 SUPPORT Human Clinical
"All subjects displayed a characteristic rash."
All 41 patients in the cohort displayed the characteristic poikilodermatous rash, supporting near-universal frequency.
Hyperkeratosis FREQUENT Hyperkeratosis HP:0000962
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"Hyperkeratotic lesions occur in approximately one third of individuals."
GeneReviews reports hyperkeratotic lesions in approximately one third of RTS patients, supporting a frequent occurrence.
Skin Cancer OCCASIONAL Neoplasm of the skin HP:0008069
Show evidence (1 reference)
PMID:11471165 SUPPORT Human Clinical
"one had skin cancer (2%)"
Documents skin cancer in an RTS cohort, supporting an occasional frequency in the syndrome.
Musculoskeletal 2
Osteopenia Osteopenia HP:0000938
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"radial ray defects, ulnar defects, absent or hypoplastic patella, and osteopenia."
GeneReviews lists osteopenia among the skeletal abnormalities of RTS.
Osteosarcoma FREQUENT Osteosarcoma HP:0002669
Show evidence (2 references)
PMID:11471165 SUPPORT Human Clinical
"Thirteen subjects had osteosarcoma (OS) (32%)"
Documents osteosarcoma in 32% (13/41) of an RTS cohort, supporting frequent frequency.
PMID:12734318 SUPPORT Human Clinical
"Rothmund-Thomson syndrome (RTS) is an autosomal recessive disorder associated with an increased predisposition to osteosarcoma."
Confirms increased osteosarcoma predisposition as a defining cancer risk in RTS.
Growth 1
Short Stature Short stature HP:0004322
Show evidence (1 reference)
PMID:31303264 SUPPORT Human Clinical
"characterized by poikiloderma, sparse hair, short stature, and skeletal anomalies"
Short stature is a defining constitutional feature of RTS.
Other 5
Cutaneous Telangiectasia Cutaneous telangiectasia HP:0034697
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"reticulated hypo- and hyperpigmentation, telangiectasias, and punctate atrophy (collectively known as poikiloderma)"
GeneReviews lists telangiectasias as a component of the chronic poikiloderma.
Sparse Eyelashes Sparse eyelashes HP:0000653
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"sparse hair, eyelashes, and/or eyebrows"
GeneReviews lists sparse eyelashes among the cardinal features of RTS.
Sparse Eyebrows Sparse eyebrow HP:0045075
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"sparse hair, eyelashes, and/or eyebrows"
GeneReviews lists sparse eyebrows among the cardinal features of RTS.
Radial Ray Deficiency OCCASIONAL Radial ray deficiency HP:0006433
Show evidence (1 reference)
PMID:11471165 SUPPORT Human Clinical
"eight had radial defects (20%)"
Documents radial ray defects in 20% (8/41) of an RTS cohort, supporting an occasional frequency.
Patellar Aplasia Patellar aplasia HP:0006443
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"Skeletal abnormalities can include radial ray defects, ulnar defects, absent or hypoplastic patella, and osteopenia."
GeneReviews lists absent or hypoplastic patella among RTS skeletal abnormalities.
🧬

Genetic Associations

2
RECQL4 (Causative)
Autosomal recessive
Show evidence (2 references)
PMID:10319867 SUPPORT Human Clinical
"mutation of RECQL4 at human chromosome 8q24.3 is responsible for at least some cases of RTS"
Confirms RECQL4 at 8q24.3 as causative for a subset of RTS (type 2).
PMID:12734318 SUPPORT Human Clinical
"Twenty-three RTS patients, including all 11 osteosarcoma patients, carried at least one of 19 truncating mutations in their RECQL4 genes."
Demonstrates that truncating RECQL4 mutations are present in all osteosarcoma patients in the cohort.
ANAPC1 (Causative)
Autosomal recessive
Show evidence (1 reference)
PMID:31303264 SUPPORT Human Clinical
"Our results demonstrate that deficiency in the APC/C is a cause of RTS type 1"
Confirms ANAPC1 (APC/C) deficiency as causative for RTS type 1.
💊

Medical Actions

5
Photoprotection
Action: supportive care MAXO:0000950
Sun avoidance and sun protection are recommended; excessive exposure to heat or sunlight should be avoided to limit skin damage in RTS.
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"Agents/circumstances to avoid: Excessive exposure to heat or sunlight"
GeneReviews recommends avoiding excessive heat and sun exposure, supporting photoprotection.
Pulsed Dye Laser for Telangiectasia
Action: pulsed dye laser therapy Ontology label: Laser Therapy NCIT:C15466
Pulsed dye laser treatment of the telangiectatic component of the rash for cosmetic management.
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"Pulsed dye laser to the telangiectatic component of the rash for cosmetic management"
GeneReviews lists pulsed dye laser for the telangiectatic rash component.
Cataract Surgery
Action: surgical procedure MAXO:0000004
Surgical removal of cataracts manages the juvenile cataracts of RTS.
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"surgical removal of cataracts"
GeneReviews lists surgical cataract removal as treatment of manifestations.
Cancer Surveillance
Action: surveillance for malignancies MAXO:0001492
Surveillance for malignancy: annual general physical, dermatologic, and eye examination; monitoring of skin for lesions with unusual color or texture and for cataracts; and prompt skeletal radiographic examination when osteosarcoma is clinically suspected (bone pain, swelling, or an enlarging limb lesion).
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"Prompt skeletal radiographic examination when clinical suspicion of osteosarcoma is present"
GeneReviews recommends prompt skeletal imaging when osteosarcoma is suspected, supporting cancer surveillance.
Cancer Treatment
Action: cancer therapeutic procedure Ontology label: Cancer Therapeutic Procedure NCIT:C16212
Standard treatment for cancer and/or hematologic concerns, including management of osteosarcoma, the hallmark malignancy of RTS type 2.
Show evidence (1 reference)
PMID:20301415 SUPPORT Human Clinical
"standard treatment for cancer and/or hematologic concerns"
GeneReviews recommends standard treatment for cancer and hematologic concerns in RTS.
{ }

Source YAML

click to show
name: Rothmund-Thomson Syndrome
creation_date: "2026-06-17T00:00:00Z"
category: Mendelian
description: >-
  Rothmund-Thomson syndrome (RTS) is a rare autosomal recessive genodermatosis
  characterized by a rash that progresses to poikiloderma; sparse hair,
  eyelashes, and eyebrows; small stature; skeletal and dental abnormalities;
  juvenile cataracts; and an increased risk for cancer, especially osteosarcoma.
  Two molecularly defined types are recognized: type 1, associated with juvenile
  cataracts and caused by biallelic ANAPC1 mutations affecting the
  anaphase-promoting complex, and type 2, defined by biallelic RECQL4 mutations,
  which is characterized by skeletal anomalies and a high risk of osteosarcoma.
  RECQL4 encodes a RecQ DNA helicase, and its deficiency causes genomic
  instability through impaired DNA replication and repair.
parents:
- Dermatological Disease
- Genetic Disease
disease_term:
  preferred_term: Rothmund-Thomson syndrome
  term:
    id: MONDO:0010002
    label: Rothmund-Thomson syndrome
mappings:
  mondo_mappings:
  - term:
      id: MONDO:0010002
      label: Rothmund-Thomson syndrome
    mapping_predicate: skos:exactMatch
    mapping_source: MONDO
    mapping_justification: Primary MONDO disease identifier for this Rothmund-Thomson syndrome entry.
external_assertions:
- name: OMIM RTS Type 1 (ANAPC1)
  source: OMIM
  assertion_type: disease_record
  external_id: OMIM:618625
  description: OMIM phenotype entry for Rothmund-Thomson syndrome type 1 (ANAPC1-related), associated with juvenile cataracts.
- name: OMIM RTS Type 2 (RECQL4)
  source: OMIM
  assertion_type: disease_record
  external_id: OMIM:268400
  description: OMIM phenotype entry for Rothmund-Thomson syndrome type 2 (RECQL4-related), characterized by skeletal anomalies and osteosarcoma risk.
classifications:
  harrisons_chapter:
  - classification_value: DERMATOLOGY
    evidence:
    - reference: PMID:11471165
      reference_title: "Clinical manifestations in a cohort of 41 Rothmund-Thomson syndrome patients."
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "Rothmund-Thomson syndrome (RTS) is a rare autosomal recessive genodermatosis characterized by a poikilodermatous rash starting in infancy"
      explanation: RTS is described as a genodermatosis with a defining poikilodermatous skin phenotype, supporting dermatology classification.
  - classification_value: GENETICS_ENVIRONMENT_DISEASE
    evidence:
    - reference: PMID:10319867
      reference_title: "Mutations in RECQL4 cause a subset of cases of Rothmund-Thomson syndrome."
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "Rothmund-Thomson syndrome (RTS; also known as poikiloderma congenitale) is a rare, autosomal recessive genetic disorder"
      explanation: RTS is an autosomal recessive genetic disorder, supporting classification under genetics.
  - classification_value: ONCOLOGY_HEMATOLOGY
    evidence:
    - reference: PMID:12734318
      reference_title: "Association between osteosarcoma and deleterious mutations in the RECQL4 gene in Rothmund-Thomson syndrome."
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "Rothmund-Thomson syndrome (RTS) is an autosomal recessive disorder associated with an increased predisposition to osteosarcoma."
      explanation: RTS is a cancer-predisposition syndrome with markedly increased osteosarcoma risk, supporting oncology classification.
has_subtypes:
- name: Type 1
  display_name: RTS Type 1 (ANAPC1-related)
  description: >
    RTS type 1 is associated with juvenile cataracts and is caused by biallelic
    mutations in ANAPC1, a scaffold subunit of the anaphase-promoting
    complex/cyclosome (APC/C). It shares the core poikiloderma, sparse hair,
    short stature, and skeletal phenotype but is distinguished clinically by the
    presence of juvenile cataracts.
- name: Type 2
  display_name: RTS Type 2 (RECQL4-related)
  description: >
    RTS type 2 is defined by biallelic mutations in RECQL4, encoding a RecQ DNA
    helicase. It is characterized by skeletal anomalies and a markedly increased
    risk of cancer, especially osteosarcoma. Truncating RECQL4 mutations are
    particularly associated with osteosarcoma risk.
inheritance:
- name: Autosomal recessive
  evidence:
  - reference: PMID:10319867
    reference_title: "Mutations in RECQL4 cause a subset of cases of Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Rothmund-Thomson syndrome (RTS; also known as poikiloderma congenitale) is a rare, autosomal recessive genetic disorder"
    explanation: Confirms autosomal recessive inheritance of RTS.
  - reference: PMID:31303264
    reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Rothmund-Thomson syndrome (RTS) is an autosomal-recessive disorder characterized by poikiloderma, sparse hair, short stature, and skeletal anomalies."
    explanation: Confirms autosomal recessive inheritance for both molecular forms of RTS.
prevalence:
- population: Global
  notes: >
    RTS is a rare disorder; fewer than 500 cases have been reported in the
    literature since its first description. Clinical cohorts assembled for study
    are correspondingly small (e.g., a contemporary cohort of 41 patients).
  evidence:
  - reference: PMID:11471165
    reference_title: "Clinical manifestations in a cohort of 41 Rothmund-Thomson syndrome patients."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "We have identified a contemporary cohort of 41 patients to better define the clinical profile, diagnostic criteria, and management of patients with RTS."
    explanation: Documents the rarity of RTS by assembling a contemporary research cohort of only 41 patients.
pathophysiology:
- name: RECQL4 DNA Helicase Deficiency
  description: >
    Biallelic loss-of-function mutations in RECQL4 cause loss of a RecQ-family
    DNA helicase that unwinds double-stranded DNA into single strands. RECQL4 is
    one of the human RecQ helicases (alongside WRN and BLM, mutated in Werner and
    Bloom syndromes) and functions in DNA replication and repair. Its deficiency
    underlies RTS type 2.
  genes:
  - preferred_term: RECQL4
    term:
      id: hgnc:9949
      label: RECQL4
  biological_processes:
  - preferred_term: RecQ DNA helicase-dependent DNA replication
    term:
      id: GO:0006260
      label: DNA replication
    modifier: DECREASED
  cell_types:
  - preferred_term: fibroblast
    term:
      id: CL:0000057
      label: fibroblast
  downstream:
  - target: Impaired DNA Replication and Repair
    description: >
      Loss of RECQL4 helicase function impairs DNA replication and DNA repair,
      since RECQL4 participates in both processes.
  evidence:
  - reference: PMID:10319867
    reference_title: "Mutations in RECQL4 cause a subset of cases of Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "we report that three RTS patients carried two types of compound heterozygous mutations in RECQL4"
    explanation: Confirms biallelic RECQL4 mutations as a molecular cause of RTS.
  - reference: PMID:10319867
    reference_title: "Mutations in RECQL4 cause a subset of cases of Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "homologues of Escherichia coli RecQ, which encodes a DNA helicase that unwinds double-stranded DNA into single-stranded DNAs"
    explanation: Establishes RECQL4 as a RecQ-family DNA helicase that unwinds duplex DNA.
- name: Impaired DNA Replication and Repair
  conforms_to: "genomic_instability_aging#Declining Genome Maintenance and Erroneous Repair"
  description: >
    RECQL4 deficiency compromises DNA replication and repair. Both RECQL4 and
    the APC/C (deficient in RTS type 1) are involved in DNA repair and
    replication, providing a possible mechanistic link between the two RTS types.
  biological_processes:
  - preferred_term: DNA replication
    term:
      id: GO:0006260
      label: DNA replication
    modifier: ABNORMAL
  - preferred_term: DNA repair
    term:
      id: GO:0006281
      label: DNA repair
    modifier: DECREASED
  downstream:
  - target: Genomic Instability and Chromosomal Rearrangements
    description: >
      Defective replication and repair lead to accumulation of DNA damage and
      chromosomal instability.
  evidence:
  - reference: PMID:31303264
    reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "suggest a possible link between the APC/C and RECQL4 helicase because both proteins are involved in DNA repair and replication"
    explanation: Both RTS-associated proteins function in DNA repair and replication, supporting impaired replication/repair as a shared mechanism.
- name: ANAPC1 Anaphase-Promoting Complex Deficiency
  description: >
    Biallelic ANAPC1 mutations reduce levels of a scaffold subunit of the
    anaphase-promoting complex/cyclosome (APC/C). A deep intronic splicing
    mutation activates a 95 bp pseudoexon, producing transcripts with premature
    termination codons subject to nonsense-mediated decay, decreased ANAPC1
    protein, and prolongation of interphase. APC/C deficiency causes RTS type 1
    and is associated with juvenile cataracts.
  genes:
  - preferred_term: ANAPC1
    term:
      id: hgnc:19988
      label: ANAPC1
  biological_processes:
  - preferred_term: anaphase-promoting complex-dependent catabolic process
    term:
      id: GO:0031145
      label: anaphase-promoting complex-dependent catabolic process
    modifier: DECREASED
  cell_types:
  - preferred_term: fibroblast
    term:
      id: CL:0000057
      label: fibroblast
  evidence:
  - reference: PMID:31303264
    reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "identified a deep intronic splicing mutation of the ANAPC1 gene, a component of the anaphase-promoting complex/cyclosome (APC/C), in all affected individuals"
    explanation: Confirms ANAPC1 (APC/C component) mutations as the cause of RTS type 1.
  - reference: PMID:31303264
    reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "the intronic mutation causes the activation of a 95 bp pseudoexon, leading to mRNAs with premature termination codons and nonsense-mediated decay, decreased ANAPC1 protein levels, and prolongation of interphase"
    explanation: "Fibroblast studies demonstrate the molecular consequence of the ANAPC1 mutation: pseudoexon activation, NMD, reduced protein, and prolonged interphase."
- name: Genomic Instability and Chromosomal Rearrangements
  conforms_to: "genomic_instability_aging#Accumulation of Somatic Mutations and Genomic Damage"
  description: >
    Cells from RTS patients show genomic instability often associated with
    chromosomal rearrangements that cause acquired somatic mosaicism. This
    instability is the proximate driver of the cancer predisposition,
    particularly osteosarcoma, that characterizes RTS type 2.
  biological_processes:
  - preferred_term: double-strand break repair via homologous recombination
    term:
      id: GO:0000724
      label: double-strand break repair via homologous recombination
    modifier: DECREASED
  cell_types:
  - preferred_term: osteoblast
    term:
      id: CL:0000062
      label: osteoblast
  downstream:
  - target: Osteosarcoma Predisposition
    description: >
      Accumulated genomic instability in mesenchymal/osteoblastic lineages
      drives osteosarcoma, the hallmark malignancy of RTS type 2.
  evidence:
  - reference: PMID:10319867
    reference_title: "Mutations in RECQL4 cause a subset of cases of Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Cytogenetic studies indicate that cells from affected patients show genomic instability often associated with chromosomal rearrangements causing an acquired somatic mosaicism."
    explanation: Confirms genomic instability and chromosomal rearrangements in RTS patient cells.
- name: Osteosarcoma Predisposition
  description: >
    RTS, especially type 2 with truncating RECQL4 mutations, carries a markedly
    increased risk of osteosarcoma. Osteosarcoma incidence is essentially zero in
    truncating-mutation-negative patients but elevated in those carrying
    truncating RECQL4 mutations.
  cell_types:
  - preferred_term: osteoblast
    term:
      id: CL:0000062
      label: osteoblast
  evidence:
  - reference: PMID:12734318
    reference_title: "Association between osteosarcoma and deleterious mutations in the RECQL4 gene in Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Mutations predicted to result in the loss of RECQL4 protein function occurred in approximately two-thirds of RTS patients and are associated with risk of osteosarcoma."
    explanation: Truncating RECQL4 mutations are associated with osteosarcoma risk in RTS.
phenotypes:
- category: Integument
  name: Poikiloderma
  description: >
    A rash that develops in infancy (typically ages three to six months) as
    erythema, swelling, and blistering on the face, subsequently spreading to the
    buttocks and extremities, then evolving over months to years into chronic
    reticulated hypo- and hyperpigmentation, telangiectasias, and punctate
    atrophy (collectively, poikiloderma) that persists throughout life. It is the
    cardinal and near-universal feature of RTS.
  frequency: VERY_FREQUENT
  phenotype_term:
    preferred_term: Poikiloderma
    term:
      id: HP:0001029
      label: Poikiloderma
    clinical_course: PROGRESSIVE
  evidence:
  - reference: PMID:11471165
    reference_title: "Clinical manifestations in a cohort of 41 Rothmund-Thomson syndrome patients."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "All subjects displayed a characteristic rash."
    explanation: All 41 patients in the cohort displayed the characteristic poikilodermatous rash, supporting near-universal frequency.
- category: Integument
  name: Cutaneous Telangiectasia
  description: >
    Telangiectasias are a component of the poikilodermatous rash, contributing to
    the chronic reticulated skin pattern of RTS.
  phenotype_term:
    preferred_term: Cutaneous telangiectasia
    term:
      id: HP:0034697
      label: Cutaneous telangiectasia
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "reticulated hypo- and hyperpigmentation, telangiectasias, and punctate atrophy (collectively known as poikiloderma)"
    explanation: GeneReviews lists telangiectasias as a component of the chronic poikiloderma.
- category: Integument
  name: Hyperkeratosis
  description: >
    Hyperkeratotic skin lesions occur in approximately one third of individuals
    with RTS, typically over pressure points and acral surfaces.
  frequency: FREQUENT
  phenotype_term:
    preferred_term: Hyperkeratosis
    term:
      id: HP:0000962
      label: Hyperkeratosis
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Hyperkeratotic lesions occur in approximately one third of individuals."
    explanation: GeneReviews reports hyperkeratotic lesions in approximately one third of RTS patients, supporting a frequent occurrence.
- category: Integument
  name: Sparse Scalp Hair
  description: >
    Sparse hair is part of the core RTS phenotype, often accompanied by sparse
    eyelashes and eyebrows.
  phenotype_term:
    preferred_term: Sparse scalp hair
    term:
      id: HP:0002209
      label: Sparse scalp hair
  evidence:
  - reference: PMID:31303264
    reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Rothmund-Thomson syndrome (RTS) is an autosomal-recessive disorder characterized by poikiloderma, sparse hair, short stature, and skeletal anomalies."
    explanation: Sparse hair is listed as a defining feature of RTS.
- category: Integument
  name: Sparse Eyelashes
  description: >
    Sparse or absent eyelashes are characteristic of RTS, along with sparse hair
    and eyebrows.
  phenotype_term:
    preferred_term: Sparse eyelashes
    term:
      id: HP:0000653
      label: Sparse eyelashes
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "sparse hair, eyelashes, and/or eyebrows"
    explanation: GeneReviews lists sparse eyelashes among the cardinal features of RTS.
- category: Integument
  name: Sparse Eyebrows
  description: >
    Sparse or absent eyebrows are part of the RTS hair phenotype.
  phenotype_term:
    preferred_term: Sparse eyebrow
    term:
      id: HP:0045075
      label: Sparse eyebrow
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "sparse hair, eyelashes, and/or eyebrows"
    explanation: GeneReviews lists sparse eyebrows among the cardinal features of RTS.
- category: Eye
  name: Juvenile Cataracts
  description: >
    Juvenile (early-onset) cataracts are characteristic of RTS and are
    particularly associated with type 1 (ANAPC1-related) disease. Mice
    heterozygous for an ANAPC1 knockout show an increased incidence of cataracts.
  phenotype_term:
    preferred_term: Juvenile cataract
    term:
      id: HP:0000518
      label: Cataract
  evidence:
  - reference: PMID:10319867
    reference_title: "Mutations in RECQL4 cause a subset of cases of Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "characterized by abnormalities in skin and skeleton, juvenile cataracts, premature ageing and a predisposition to neoplasia"
    explanation: Juvenile cataracts are a defining feature of RTS.
  - reference: PMID:31303264
    reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "the genetic basis of RTS type 1, which is associated with juvenile cataracts"
    explanation: Associates juvenile cataracts specifically with RTS type 1 (ANAPC1).
- category: Growth
  name: Short Stature
  description: >
    Small size / short stature is a constitutional feature of RTS.
  phenotype_term:
    preferred_term: Short stature
    term:
      id: HP:0004322
      label: Short stature
  evidence:
  - reference: PMID:31303264
    reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "characterized by poikiloderma, sparse hair, short stature, and skeletal anomalies"
    explanation: Short stature is a defining constitutional feature of RTS.
- category: Musculoskeletal
  name: Radial Ray Deficiency
  description: >
    Skeletal abnormalities of RTS can include radial ray defects (and ulnar
    defects). In a cohort of 41 patients, 20% had radial defects.
  frequency: OCCASIONAL
  phenotype_term:
    preferred_term: Radial ray deficiency
    term:
      id: HP:0006433
      label: Radial ray deficiency
  evidence:
  - reference: PMID:11471165
    reference_title: "Clinical manifestations in a cohort of 41 Rothmund-Thomson syndrome patients."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "eight had radial defects (20%)"
    explanation: Documents radial ray defects in 20% (8/41) of an RTS cohort, supporting an occasional frequency.
- category: Musculoskeletal
  name: Patellar Aplasia
  description: >
    Absent or hypoplastic patella is among the skeletal abnormalities described
    in RTS.
  phenotype_term:
    preferred_term: Patellar aplasia
    term:
      id: HP:0006443
      label: Patellar aplasia
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Skeletal abnormalities can include radial ray defects, ulnar defects, absent or hypoplastic patella, and osteopenia."
    explanation: GeneReviews lists absent or hypoplastic patella among RTS skeletal abnormalities.
- category: Musculoskeletal
  name: Osteopenia
  description: >
    Reduced bone mineral density (osteopenia) is among the skeletal
    abnormalities described in RTS.
  phenotype_term:
    preferred_term: Osteopenia
    term:
      id: HP:0000938
      label: Osteopenia
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "radial ray defects, ulnar defects, absent or hypoplastic patella, and osteopenia."
    explanation: GeneReviews lists osteopenia among the skeletal abnormalities of RTS.
- category: Craniofacial
  name: Dental Abnormalities
  description: >
    Dental abnormalities are part of the core RTS phenotype, listed among the
    characteristic clinical features alongside skeletal abnormalities.
  phenotype_term:
    preferred_term: Abnormality of the dentition
    term:
      id: HP:0000164
      label: Abnormality of the dentition
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "skeletal and dental abnormalities"
    explanation: GeneReviews lists dental abnormalities among the characteristic clinical features of RTS.
- category: Gastrointestinal
  name: Gastrointestinal Abnormalities
  description: >
    Gastrointestinal findings (such as chronic diarrhea and feeding problems,
    particularly in infancy) occur in a substantial minority of RTS patients;
    17% had gastrointestinal findings in a cohort of 41 patients.
  frequency: OCCASIONAL
  phenotype_term:
    preferred_term: Abnormality of the gastrointestinal tract
    term:
      id: HP:0011024
      label: Abnormality of the gastrointestinal tract
  evidence:
  - reference: PMID:11471165
    reference_title: "Clinical manifestations in a cohort of 41 Rothmund-Thomson syndrome patients."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "seven had gastrointestinal findings (17%)"
    explanation: Documents gastrointestinal findings in 17% (7/41) of an RTS cohort, supporting an occasional frequency.
- category: Neoplasm
  name: Osteosarcoma
  description: >
    RTS confers a markedly increased risk of osteosarcoma, the hallmark
    malignancy of type 2 (RECQL4) disease. In a cohort of 41 patients, 32% had
    osteosarcoma; osteosarcoma risk is associated with truncating RECQL4
    mutations.
  frequency: FREQUENT
  phenotype_term:
    preferred_term: Osteosarcoma
    term:
      id: HP:0002669
      label: Osteosarcoma
  evidence:
  - reference: PMID:11471165
    reference_title: "Clinical manifestations in a cohort of 41 Rothmund-Thomson syndrome patients."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Thirteen subjects had osteosarcoma (OS) (32%)"
    explanation: Documents osteosarcoma in 32% (13/41) of an RTS cohort, supporting frequent frequency.
  - reference: PMID:12734318
    reference_title: "Association between osteosarcoma and deleterious mutations in the RECQL4 gene in Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Rothmund-Thomson syndrome (RTS) is an autosomal recessive disorder associated with an increased predisposition to osteosarcoma."
    explanation: Confirms increased osteosarcoma predisposition as a defining cancer risk in RTS.
- category: Neoplasm
  name: Skin Cancer
  description: >
    Skin cancer occurs at increased frequency in RTS, reflecting the cancer
    predisposition of the syndrome, though it is less frequent than osteosarcoma
    in pediatric cohorts.
  frequency: OCCASIONAL
  phenotype_term:
    preferred_term: Neoplasm of the skin
    term:
      id: HP:0008069
      label: Neoplasm of the skin
  evidence:
  - reference: PMID:11471165
    reference_title: "Clinical manifestations in a cohort of 41 Rothmund-Thomson syndrome patients."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "one had skin cancer (2%)"
    explanation: Documents skin cancer in an RTS cohort, supporting an occasional frequency in the syndrome.
genetic:
- name: RECQL4
  association: Causative
  inheritance:
  - name: Autosomal recessive
    evidence:
    - reference: PMID:10319867
      reference_title: "Mutations in RECQL4 cause a subset of cases of Rothmund-Thomson syndrome."
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "the mutated alleles were inherited from the parents in one affected family and were not found in ethnically matched controls"
      explanation: Compound heterozygous RECQL4 alleles inherited from both parents support autosomal recessive transmission.
  notes: >
    RECQL4 at chromosome 8q24.3 encodes a RecQ-family DNA helicase. Biallelic
    (often compound heterozygous) loss-of-function mutations cause RTS type 2.
    Truncating mutations occur in approximately two-thirds of RTS patients and
    are associated with osteosarcoma risk.
  evidence:
  - reference: PMID:10319867
    reference_title: "Mutations in RECQL4 cause a subset of cases of Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "mutation of RECQL4 at human chromosome 8q24.3 is responsible for at least some cases of RTS"
    explanation: Confirms RECQL4 at 8q24.3 as causative for a subset of RTS (type 2).
  - reference: PMID:12734318
    reference_title: "Association between osteosarcoma and deleterious mutations in the RECQL4 gene in Rothmund-Thomson syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Twenty-three RTS patients, including all 11 osteosarcoma patients, carried at least one of 19 truncating mutations in their RECQL4 genes."
    explanation: Demonstrates that truncating RECQL4 mutations are present in all osteosarcoma patients in the cohort.
- name: ANAPC1
  association: Causative
  inheritance:
  - name: Autosomal recessive
    evidence:
    - reference: PMID:31303264
      reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "in all affected individuals, either in the homozygous state or in trans with another mutation"
      explanation: Biallelic ANAPC1 mutations (homozygous or compound heterozygous) support autosomal recessive transmission.
  notes: >
    ANAPC1 encodes a scaffold subunit of the anaphase-promoting
    complex/cyclosome (APC/C). A deep intronic splicing mutation activating a
    95 bp pseudoexon causes RTS type 1, which is associated with juvenile
    cataracts.
  evidence:
  - reference: PMID:31303264
    reference_title: "Mutations in ANAPC1, Encoding a Scaffold Subunit of the Anaphase-Promoting Complex, Cause Rothmund-Thomson Syndrome Type 1."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Our results demonstrate that deficiency in the APC/C is a cause of RTS type 1"
    explanation: Confirms ANAPC1 (APC/C) deficiency as causative for RTS type 1.
treatments:
- name: Photoprotection
  description: >
    Sun avoidance and sun protection are recommended; excessive exposure to heat
    or sunlight should be avoided to limit skin damage in RTS.
  treatment_term:
    preferred_term: supportive care
    term:
      id: MAXO:0000950
      label: supportive care
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Agents/circumstances to avoid: Excessive exposure to heat or sunlight"
    explanation: GeneReviews recommends avoiding excessive heat and sun exposure, supporting photoprotection.
- name: Pulsed Dye Laser for Telangiectasia
  description: >
    Pulsed dye laser treatment of the telangiectatic component of the rash for
    cosmetic management.
  treatment_term:
    preferred_term: pulsed dye laser therapy
    term:
      id: NCIT:C15466
      label: Laser Therapy
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Pulsed dye laser to the telangiectatic component of the rash for cosmetic management"
    explanation: GeneReviews lists pulsed dye laser for the telangiectatic rash component.
- name: Cataract Surgery
  description: >
    Surgical removal of cataracts manages the juvenile cataracts of RTS.
  treatment_term:
    preferred_term: surgical procedure
    term:
      id: MAXO:0000004
      label: surgical procedure
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "surgical removal of cataracts"
    explanation: GeneReviews lists surgical cataract removal as treatment of manifestations.
- name: Cancer Surveillance
  description: >
    Surveillance for malignancy: annual general physical, dermatologic, and eye
    examination; monitoring of skin for lesions with unusual color or texture and
    for cataracts; and prompt skeletal radiographic examination when osteosarcoma
    is clinically suspected (bone pain, swelling, or an enlarging limb lesion).
  treatment_term:
    preferred_term: surveillance for malignancies
    term:
      id: MAXO:0001492
      label: surveillance for malignancies
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Prompt skeletal radiographic examination when clinical suspicion of osteosarcoma is present"
    explanation: GeneReviews recommends prompt skeletal imaging when osteosarcoma is suspected, supporting cancer surveillance.
- name: Cancer Treatment
  description: >
    Standard treatment for cancer and/or hematologic concerns, including
    management of osteosarcoma, the hallmark malignancy of RTS type 2.
  treatment_term:
    preferred_term: cancer therapeutic procedure
    term:
      id: NCIT:C16212
      label: Cancer Therapeutic Procedure
  evidence:
  - reference: PMID:20301415
    reference_title: "Rothmund-Thomson Syndrome."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "standard treatment for cancer and/or hematologic concerns"
    explanation: GeneReviews recommends standard treatment for cancer and hematologic concerns in RTS.
notes: >
  RTS belongs to the RECQL4-spectrum of disorders, which also includes RAPADILINO
  syndrome and Baller-Gerold syndrome; these are allelic RECQL4-related
  conditions distinct from RTS. RTS is one of three human RecQ-helicase disorders
  alongside Werner syndrome (WRN) and Bloom syndrome (BLM). Recommended action
  for this entry was CURATE_ROOT_WITH_SUBTYPES (type 1 ANAPC1-related; type 2
  RECQL4-related). The classic two-gene model (RECQL4 = type 2, ANAPC1 = type 1)
  captures the established RTS spectrum curated here. More recently, biallelic
  variants in DNA2 and CRIPT have been reported to cause RTS-like phenotypes
  (poikiloderma with congenital cataracts and severe growth failure for DNA2;
  RTS-like disease with prominent neurodevelopmental involvement for CRIPT);
  these emerging RTS-like entities are noted for completeness but were not
  curated as RTS subtypes in this entry pending firmer nosological placement.
references:
- reference: PMID:20301415
  title: "Rothmund-Thomson Syndrome."
  tags:
  - GeneReviews
📚

References & Deep Research

References

1
Rothmund-Thomson Syndrome.
No top-level findings curated for this source.

Deep Research

1
Falcon
1. Disease Information
Edison Scientific Literature 40 citations 2026-06-17T21:49:57.955446

1. Disease Information

1.1 Definition and overview (current understanding)

RTS is classically defined as an autosomal recessive genodermatosis in which poikiloderma is the major hallmark. (martins2023rothmundthomsonsyndromea pages 1-2, larizza2010rothmundthomsonsyndrome pages 1-2)

Core clinical concepts: - Diagnostic hallmark skin lesion: early-onset facial erythema spreading to extremities (trunk often spared) that evolves into poikiloderma, typically arising in infancy (often reported ~3–6 months, with some sources noting onset in the first year). (larizza2010rothmundthomsonsyndrome pages 1-2, martins2023rothmundthomsonsyndromea pages 1-2) - Multisystem involvement: ectodermal changes (sparse hair/eyebrows/eyelashes, nail dystrophy, dental anomalies), skeletal anomalies (including radial ray defects and osteopenia), and ocular abnormalities (especially cataracts in specific genetic subtypes). (martins2023rothmundthomsonsyndromea pages 2-3, larizza2010rothmundthomsonsyndrome pages 1-2)

1.2 Key identifiers

  • OMIM: 268400 (RTS) (larizza2010rothmundthomsonsyndrome pages 1-2, colombo2018rothmundthomsonsyndromeinsights pages 1-3)
  • OMIM (as cited in recent review): 618625 and 268400 (martins2023rothmundthomsonsyndromea pages 1-2)

Not retrieved in the current evidence set (cannot verify here): MONDO ID, MeSH descriptor ID, Orphanet ORPHA number, ICD-10/ICD-11 codes.

1.3 Synonyms and alternative names

  • RTS is also referred to as “congenital poikiloderma” in clinical case series usage. (larizza2010rothmundthomsonsyndrome pages 1-2)

1.4 Evidence provenance

The majority of disease characterization here is derived from aggregated disease-level resources and literature (reviews, cohorts, case series) rather than EHR-derived databases. (larizza2010rothmundthomsonsyndrome pages 1-2, martins2023rothmundthomsonsyndromea pages 1-2, cao2017generalizedmetabolicbone pages 1-2)


2. Etiology

2.1 Disease causal factors

RTS is primarily a genetic disorder with autosomal recessive inheritance. (martins2023rothmundthomsonsyndromea pages 1-2, larizza2010rothmundthomsonsyndrome pages 1-2)

Historically, RTS was divided into: - RTS type 2 (RTS2): biallelic RECQL4 variants (cancer predisposition—especially osteosarcoma). (martins2023rothmundthomsonsyndromea pages 2-3, zirn2021rothmund–thomsonsyndrometype pages 1-2) - RTS type 1 (RTS1): RECQL4-negative RTS with prominent cataracts; now associated with biallelic ANAPC1 defects. (zirn2021rothmund–thomsonsyndrometype pages 1-2, martins2023rothmundthomsonsyndromea pages 2-3)

Recent genetic heterogeneity: A 2023 synthesis emphasizes that RTS is now associated with RECQL4, ANAPC1, DNA2, and CRIPT across the clinical RTS spectrum. (martins2023rothmundthomsonsyndromea pages 2-3, martins2023rothmundthomsonsyndromea pages 3-4)

2.2 Risk factors

2.2.1 Genetic risk factors (cancer predisposition beyond classic RTS)

A large pediatric cancer sequencing study reported enrichment of heterozygous germline RECQL4 loss-of-function (LOF) variants among pediatric osteosarcoma cases: - 24/5562 pediatric cancer patients (0.43%) carried RECQL4 LOF variants; 5/249 osteosarcoma cases (2.0%) were carriers. (maciaszek2019enrichmentofheterozygous pages 1-2) - Enrichment vs gnomAD noncancer controls: OR 7.1 (95% CI 2.9–17), P = 0.00087. (maciaszek2019enrichmentofheterozygous pages 1-2, maciaszek2019enrichmentofheterozygous pages 4-5, maciaszek2019enrichmentofheterozygous pages 8-10) - A recurrent frameshift c.1573delT (p.Cys525Alafs) appeared in 9/24 (38%) LOF carriers (across diagnoses) and was itself enriched vs gnomAD (P = 0.0024; OR = 3.3). (maciaszek2019enrichmentofheterozygous pages 1-2, maciaszek2019enrichmentofheterozygous pages 6-8)

Interpretation: while RTS itself is recessive, these data support RECQL4 haploinsufficiency/heterozygosity as a potential pediatric osteosarcoma susceptibility factor, distinct from RTS diagnosis. (maciaszek2019enrichmentofheterozygous pages 1-2, maciaszek2019enrichmentofheterozygous pages 8-10)

2.2.2 Environmental risk factors / protective factors / GxE

No RTS-specific environmental risk/protective factors or gene–environment interaction evidence was retrievable in the current evidence set.


3. Phenotypes

3.1 Major phenotypes and characteristics

Age of onset (skin): rash begins in infancy (often ~3–6 months in classic descriptions; 3–10 months cited in a modern diagnostic summary) and evolves to poikiloderma. (larizza2010rothmundthomsonsyndrome pages 1-2, martins2023rothmundthomsonsyndromea pages 1-2)

Common phenotypes (examples; not exhaustive): - Poikiloderma (hallmark) — HPO suggestion: HP:0001003. (larizza2010rothmundthomsonsyndrome pages 1-2, martins2023rothmundthomsonsyndromea pages 1-2) - Sparse scalp hair / eyebrows / eyelashes — HPO suggestions: Sparse scalp hair HP:0008070, Sparse eyebrow HP:0045075, Sparse eyelashes HP:0000653. (martins2023rothmundthomsonsyndromea pages 2-3) - Short stature / severe growth failure — HPO: HP:0004322. (martins2023rothmundthomsonsyndromea pages 2-3) - Skeletal anomalies including radial ray defects, osteopenia, metaphyseal changes — HPO: Radial ray defect HP:0004074, Osteopenia HP:0000938. (larizza2010rothmundthomsonsyndrome pages 1-2, martins2023rothmundthomsonsyndromea pages 2-3) - Cataracts: classically described but now strongly gene-stratified (see below) — HPO: Cataract HP:0000518. (larizza2010rothmundthomsonsyndrome pages 1-2, martins2023rothmundthomsonsyndromea pages 3-4)

3.2 Gene-stratified phenotype frequencies (recent consolidation)

A 2023 review compiled gene-stratified frequencies (RECQL4 n=43; ANAPC1 n=11; CRIPT n=6; DNA2 n=8) for key phenotypes (Table 1). (martins2023rothmundthomsonsyndromea pages 3-4, martins2023rothmundthomsonsyndromea media 879ff8e8, martins2023rothmundthomsonsyndromea media c362ed4d)

Key examples from that table: - Poikiloderma: RECQL4 41/43; ANAPC1 11/11; CRIPT 4/4; DNA2 7/7. (martins2023rothmundthomsonsyndromea pages 3-4, martins2023rothmundthomsonsyndromea media 879ff8e8, martins2023rothmundthomsonsyndromea media c362ed4d) - Sparse hair/eyebrows/eyelashes: RECQL4 29/43; ANAPC1 10/11; CRIPT 5/5; DNA2 7/7. (martins2023rothmundthomsonsyndromea pages 3-4, martins2023rothmundthomsonsyndromea media 879ff8e8) - Prenatal short stature (where reported): RECQL4 34/43; ANAPC1 7/11; CRIPT 6/6; DNA2 7/7. (martins2023rothmundthomsonsyndromea pages 3-4, martins2023rothmundthomsonsyndromea media 879ff8e8) - Cataracts: RECQL4 0/26; ANAPC1 10/10 (juvenile); DNA2 7/7 (6/7 congenital); CRIPT 1/6. (martins2023rothmundthomsonsyndromea pages 3-4, martins2023rothmundthomsonsyndromea media 879ff8e8) - Radial ray defects: RECQL4 14/40; DNA2 0/7 (not observed in that group). (martins2023rothmundthomsonsyndromea pages 3-4, martins2023rothmundthomsonsyndromea media 879ff8e8)

3.3 Quality-of-life impact

Validated QoL instrument data (e.g., SF-36, EQ-5D, PROMIS) were not retrievable in the current evidence set. However, disease burden is plausibly substantial due to (i) fracture burden/low bone density, (ii) ophthalmologic impairment in cataract-predominant subtypes, and (iii) intensive malignancy surveillance/treatment in RECQL4-associated disease. (cao2017generalizedmetabolicbone pages 1-2, zirn2021rothmund–thomsonsyndrometype pages 1-2, martins2023rothmundthomsonsyndromea pages 2-3)


4. Genetic / Molecular Information

4.1 Causal genes and subtype mapping

  • RECQL4 (RTS2): genome caretaker helicase involved in DNA replication/repair; biallelic pathogenic variants drive RTS2 and cancer predisposition. (martins2023rothmundthomsonsyndromea pages 2-3, larizza2010rothmundthomsonsyndrome pages 1-2)
  • ANAPC1 (RTS1): biallelic defects; cataract-predominant RTS1 phenotype; recurrent intronic variant can be missed by routine exome analysis. (zirn2021rothmund–thomsonsyndrometype pages 1-2)
  • DNA2 (RTS-like spectrum; 2023): biallelic variants cause an RTS-like syndrome with poikiloderma, congenital cataracts, and severe growth failure, with functional DNA repair defects. (filho2023biallelicvariantsin pages 1-1, filho2023biallelicvariantsin pages 5-5)
  • CRIPT (RTS-like spectrum): biallelic variants associated with RTS-like phenotype with prominent neurodevelopmental involvement. (martins2023rothmundthomsonsyndromea pages 3-4)

4.2 Variant classes and functional consequences

In a 2023 synthesis across RTS-spectrum genes, most catalogued variants are predicted loss-of-function/splice/early termination; one quantified statement was: “a large proportion (87/114, or 76%) consist of variants that are either large deletions or are predicted to lead to premature termination codons (PTCs) or splicing defects”, implying reduced mRNA/protein levels via quality control (e.g., nonsense-mediated decay). (martins2023rothmundthomsonsyndromea pages 3-4)

For DNA2-related RTS-like disease, the recurrent deep intronic variant (c.588–2214A>G; described in detail in text) creates a novel splice donor with insertion of intronic sequence and an early stop codon; functional studies found reduced DNA2 protein and reduced camptothecin-induced end resection, consistent with impaired DSB repair processing. (filho2023estudogenéticode pages 40-44, filho2023biallelicvariantsin pages 5-5)

Population allele frequency, ClinVar classification counts, and gnomAD frequencies for specific RTS-causing variants were not comprehensively retrievable in the current evidence set (except as reported for select RECQL4 LOF variants in the osteosarcoma enrichment analysis). (maciaszek2019enrichmentofheterozygous pages 6-8)

4.3 Modifier genes / epigenetics / chromosomal abnormalities

No robust modifier-gene or epigenetic signatures were retrieved in the current evidence set. Chromosomal mosaicism was mentioned in the older review context but not extractable here as a structured dataset. (larizza2010rothmundthomsonsyndrome pages 1-2)


5. Environmental Information

RTS is predominantly genetic; no RTS-specific environmental or infectious causal contributors were retrievable in the current evidence set.


6. Mechanism / Pathophysiology

6.1 Genome maintenance and replication stress (upstream mechanisms)

RECQL4 dysfunction is framed as a genome instability mechanism contributing to developmental defects and cancer predisposition in RTS2. (larizza2010rothmundthomsonsyndrome pages 1-2, martins2023rothmundthomsonsyndromea pages 6-7)

GO (biological process) suggestions (non-exhaustive): DNA replication; DNA repair; response to replication stress; maintenance of genome stability.

6.2 DNA2-related RTS-like syndrome: impaired DSB repair processing

The DNA2 RTS-like phenotype is supported by functional evidence of impaired DNA repair: reduced DNA2 protein in patient cells and reduced camptothecin-induced end resection in patient fibroblasts consistent with DNA2 deficiency. (filho2023biallelicvariantsin pages 5-5, filho2023estudogenéticode pages 40-44)

GO suggestions: double-strand break repair; DNA end resection.

6.3 Bone pathophysiology: low bone mass, osteoblast defects, fracture burden

A detailed clinical cohort (n=29) and complementary mouse work supported generalized skeletal fragility/low bone mass: - In humans, fractures were reported in 45% of children (9/20) and 67% of adults (6/9); among those with fracture, 67% (10/15) had ≥2 fractures. (cao2017generalizedmetabolicbone pages 1-2) - Multivariate analysis linked RECQL4 mutation status and low lumbar spine aBMD to fracture counts; RECQL4 status RR 5.32 for fracture number. (cao2017generalizedmetabolicbone pages 1-2) - The authors propose deficits in osteoblast number/function as a key mediator, consistent with conditional Recql4 skeletal progenitor mouse findings. (cao2017generalizedmetabolicbone pages 6-7, cao2017generalizedmetabolicbone pages 5-6)

UBERON suggestions: bone (UBERON:0002481); skin (UBERON:0002097); eye (UBERON:0000970).

6.4 -omics / advanced models: iPSC-derived osteoblasts and mitochondrial complex I

A patient-derived iPSC RTS model connected osteosarcoma risk biology to mitochondrial metabolism: - RTS iPSC-derived osteoblasts showed defective osteogenic differentiation and increased tumorigenic ability, with transcriptomic evidence of aberrantly upregulated mitochondrial respiratory complex I gene expression and increased OXPHOS/ATP. (jewell2021patientderivedipscslink pages 1-2) - Complex I inhibition (IACS-010759) selectively suppressed RTS osteoblast respiration/proliferation and induced senescence, with systems analysis indicating decreased MAPK signaling and cell-cycle associated genes. (jewell2021patientderivedipscslink pages 11-13, jewell2021patientderivedipscslink pages 1-2)

Cell Ontology (CL) suggestions: osteoblast.


7. Anatomical Structures Affected

Key systems implicated across evidence: - Skin: facial rash/poikiloderma (primary hallmark). (larizza2010rothmundthomsonsyndrome pages 1-2) - Skeletal system: radial ray defects, osteopenia/low bone mass, fractures. (larizza2010rothmundthomsonsyndrome pages 1-2, cao2017generalizedmetabolicbone pages 1-2) - Eye: juvenile or congenital cataracts (especially ANAPC1/DNA2 groups). (martins2023rothmundthomsonsyndromea pages 3-4, zirn2021rothmund–thomsonsyndrometype pages 1-2)


8. Temporal Development

  • Onset: typically infancy (rash appears in the first year; often around 3–6 months). (larizza2010rothmundthomsonsyndrome pages 1-2)
  • Course: rash evolves into persistent poikiloderma; multisystem findings (growth, skeletal anomalies, cataracts) accumulate or become apparent during development; osteosarcoma risk manifests in childhood (median age 11.5 years). (martins2023rothmundthomsonsyndromea pages 2-3, larizza2010rothmundthomsonsyndrome pages 1-2)

9. Inheritance and Population

9.1 Inheritance

Autosomal recessive inheritance is consistently reported. (martins2023rothmundthomsonsyndromea pages 1-2, larizza2010rothmundthomsonsyndrome pages 1-2)

9.2 Epidemiology

Reliable prevalence/incidence data are not available in the retrieved evidence. Reviews note the rarity and approximate case counts: - ~300 recorded cases historically (older review). (larizza2010rothmundthomsonsyndrome pages 1-2) - ~400 reported patients referenced in a 2018 review. (colombo2018rothmundthomsonsyndromeinsights pages 1-3)


10. Diagnostics

10.1 Clinical diagnosis

Diagnosis is anchored in the characteristic early rash/poikiloderma plus multisystem features. A modern diagnostic summary cites criteria requiring poikiloderma plus at least two additional features (e.g., cataracts, dental abnormalities, GI issues, hyperkeratosis, cancer, nail/skeletal abnormalities, short stature, sparse hair). (martins2023rothmundthomsonsyndromea pages 1-2)

10.2 Genetic testing approach (real-world implementation)

  • RTS2: RECQL4 molecular testing is central; older guidance emphasizes that transcript analysis can be needed to detect intronic deletions/missplicing. (larizza2010rothmundthomsonsyndrome pages 1-2)
  • RTS1 (ANAPC1): the recurrent intronic ANAPC1 variant may be missed by routine exome workflows; combined approaches (exome + CNV methods) may be required. (zirn2021rothmund–thomsonsyndrometype pages 1-2)
  • RECQL4-negative RTS-like cases: exome/genome sequencing has enabled identification of CRIPT and DNA2 etiologies. (martins2023rothmundthomsonsyndromea pages 2-3, filho2023biallelicvariantsin pages 1-1)

10.3 Differential diagnosis

The older Orphanet review lists differentials among childhood poikiloderma and genome instability syndromes, including dyskeratosis congenita, Kindler syndrome, poikiloderma with neutropenia, Bloom syndrome, Werner syndrome, ataxia-telangiectasia, and RECQL4 allelic conditions (RAPADILINO, Baller–Gerold). (larizza2010rothmundthomsonsyndrome pages 1-2)


11. Outcome / Prognosis

11.1 Cancer outcomes

A 2010 Orphanet review reported that osteosarcoma outcomes in RTS were similar to non-RTS osteosarcoma, with 5-year survival ~60–70%. (larizza2010rothmundthomsonsyndrome pages 1-2)

11.2 Morbidity

Skeletal morbidity is substantial in some patients due to low bone mass and fractures (see Section 6.3). (cao2017generalizedmetabolicbone pages 1-2)


12. Treatment

12.1 Supportive care and standard interventions

Older management guidance describes symptomatic/supportive measures and standard-of-care treatments: - Pulsed dye laser photocoagulation to improve telangiectatic rash component. (larizza2010rothmundthomsonsyndrome pages 1-2) - Cataract surgery when indicated. (larizza2010rothmundthomsonsyndrome pages 1-2) - Standard oncology care for individuals developing malignancy. (larizza2010rothmundthomsonsyndrome pages 1-2)

12.2 Bone health management

A detailed RTS bone cohort recommends: - Baseline DXA at diagnosis and detailed fracture history. (cao2017generalizedmetabolicbone pages 6-7) - Calcium/vitamin D per general guidelines; consider bisphosphonates for multiple/serious fractures; avoid teriparatide due to osteosarcoma risk context. (cao2017generalizedmetabolicbone pages 6-7)

12.3 MAXO term suggestions (non-exhaustive)

  • Genetic counseling; ophthalmologic monitoring; DXA scan; bisphosphonate therapy; cancer surveillance.

13. Prevention

Primary prevention of a monogenic recessive disorder is mainly via genetic counseling, carrier testing where appropriate, and reproductive options; cancer/complication prevention is primarily secondary/tertiary via surveillance (especially for RECQL4-associated osteosarcoma and skin cancer) and proactive bone health management. (larizza2010rothmundthomsonsyndrome pages 1-2, zirn2021rothmund–thomsonsyndrometype pages 1-2, cao2017generalizedmetabolicbone pages 6-7)


14. Other Species / Natural Disease

No naturally occurring non-human RTS analogs were retrieved in the current evidence set.


15. Model Organisms

15.1 Mouse model evidence

A conditional Recql4 skeletal progenitor loss model shows marked trabecular and cortical deficits and supports reduced osteoblast number/osteoid as a mechanism for low bone volume and fragility. (cao2017generalizedmetabolicbone pages 6-7, cao2017generalizedmetabolicbone pages 5-6)

15.2 Cellular models

Patient-derived iPSCs differentiated to osteoblasts provide a human platform linking RECQL4-associated RTS to osteosarcoma-relevant metabolic rewiring (complex I/OXPHOS). (jewell2021patientderivedipscslink pages 1-2)


Recent developments and latest research (prioritizing 2023–2024)

1) Genetic expansion of the RTS spectrum (2023): a 2023 review emphasizes RTS as “far from solved,” highlighting ANAPC1, DNA2, and CRIPT alongside RECQL4 and compiling gene-stratified phenotypes. (Nov 2023; https://doi.org/10.3389/fragi.2023.1296409) (martins2023rothmundthomsonsyndromea pages 1-2, martins2023rothmundthomsonsyndromea pages 3-4, martins2023rothmundthomsonsyndromea media 879ff8e8, martins2023rothmundthomsonsyndromea media c362ed4d)

2) DNA2 as an RTS-like gene (2023, primary study): “Biallelic variants in DNA2 cause poikiloderma with congenital cataracts and severe growth failure reminiscent of Rothmund-Thomson syndrome.” (Apr 2023; https://doi.org/10.1136/jmg-2022-109119) (filho2023biallelicvariantsin pages 1-1, filho2023estudogenéticode pages 40-44)

3) Cancer risk estimates in a modern synthesis (2023): the 2023 review provides quantitative summary estimates (osteosarcoma prevalence ~30%, skin cancer ~5%, median osteosarcoma age 11.5 years). (martins2023rothmundthomsonsyndromea pages 2-3)

4) 2024: RTS case reports continue to expand variant/phenotype spectra in specific populations, but detailed 2024 primary cohort statistics were not retrievable in the current evidence set.


Clinical trials / real-world research implementations (ClinicalTrials.gov)

  • NCT01304407 “Calcium Absorption in Patients With Rothmund-Thomson Syndrome” (Baylor College of Medicine). Start: Mar 2011; completed; results first posted 2020-07-08. Focus: DXA Z-scores, calcium tracer kinetics in RTS (n=29). URL: https://clinicaltrials.gov/study/NCT01304407 (NCT01304407 chunk 1)

  • NCT03898817 “Pathology of Helicases and Premature Aging: Study by Derivation of hiPS” (University Hospital, Montpellier). Start: 2015-09-09; terminated; focus: patient-derived iPS/hiPS modeling of helicase disorders including RTS; outcomes include karyotype/array-CGH, telomere Q-FISH, centrosome duplication, senescence markers. URL: https://clinicaltrials.gov/study/NCT03898817 (NCT03898817 chunk 1)

  • NCT03050268 “Familial Investigations of Childhood Cancer Predisposition” (St. Jude). Start: 2017-04-06; recruiting; registry/biorepository and WGS/WES for novel predisposition genes; RTS included in conditions. URL: https://clinicaltrials.gov/study/NCT03050268 (NCT03050268 chunk 1, NCT03050268 chunk 2)


Structured summary table

Category Item Key details/statistics Evidence/source (author year, journal) URL Notes/ontology suggestions (e.g., HPO/GO/UBERON/MAXO)
Disease information Disease name Rothmund–Thomson syndrome (RTS), a rare autosomal recessive genodermatosis with poikiloderma as the main hallmark Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 1-2); Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1186/1750-1172-5-2 MONDO not confirmed in current snippets; HPO: Poikiloderma HP:0001003
Disease information Key identifiers OMIM #268400; Martins review also cites OMIM #618625 alongside #268400 Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 1-2); Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1186/1750-1172-5-2 Orphanet/MeSH/ICD not directly confirmed in available snippets
Disease information Synonyms / related names “Congenital poikiloderma” reported as an alternative name in case series; related RECQL4 phenotypic spectrum includes RAPADILINO and Baller-Gerold syndromes Sánchez-Padilla 2022, Boletín Médico del Hospital Infantil de México (larizza2010rothmundthomsonsyndrome pages 1-2, salih2018rothmundthomsonsyndrome(rts) pages 1-2); Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 6-7) https://doi.org/10.24875/bmhim.21000013 ; https://doi.org/10.3389/fragi.2023.1296409 HPO: Congenital poikiloderma conceptually overlaps HP:0001003
Epidemiology Prevalence / rarity Prevalence unknown; ~300 reported cases in older literature, ~400 reported patients noted in 2018 review Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2); Colombo 2018, IJMS (colombo2018rothmundthomsonsyndromeinsights pages 1-3) https://doi.org/10.1186/1750-1172-5-2 ; https://doi.org/10.3390/ijms19041103 Aggregated disease-level literature, not EHR-derived
Etiology / inheritance Inheritance pattern Autosomal recessive Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 1-2); Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1186/1750-1172-5-2 HP:0000007 Autosomal recessive inheritance
Genetics / subtype RTS type 2 Biallelic RECQL4 variants; classically associated with skeletal abnormalities and increased cancer susceptibility, especially osteosarcoma Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3); Zirn 2021, Skin Health and Disease (zirn2021rothmund–thomsonsyndrometype pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1002/ski2.12 Gene: RECQL4; GO suggestions: DNA replication, DNA repair
Genetics / subtype RTS type 1 Biallelic ANAPC1 defects; juvenile cataracts emphasized; osteosarcoma risk not observed in reported cases Zirn 2021, Skin Health and Disease (zirn2021rothmund–thomsonsyndrometype pages 1-2); Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3) https://doi.org/10.1002/ski2.12 ; https://doi.org/10.3389/fragi.2023.1296409 Gene: ANAPC1; ophthalmologic surveillance relevant
Genetics / heterogeneity Updated gene list RTS is now genetically heterogeneous: RECQL4, ANAPC1, DNA2, CRIPT reported in current evidence Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 3-4, martins2023rothmundthomsonsyndromea pages 2-3) https://doi.org/10.3389/fragi.2023.1296409 Useful for multigene panels / WES / WGS
Genetics / prevalence RECQL4 contribution RECQL4 variants in ~60–65% of RTS patients in older reviews; Martins notes ~60% RECQL4-positive and ~40% RECQL4-negative historically Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2); Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3) https://doi.org/10.1186/1750-1172-5-2 ; https://doi.org/10.3389/fragi.2023.1296409 Supports tiered testing and unresolved-case exome/genome sequencing
Genetics / prevalence ANAPC1 contribution ANAPC1 mutations account for ~10% of RTS patients in Martins review Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3) https://doi.org/10.3389/fragi.2023.1296409 Important intronic variant may be missed by routine exome workflows
Phenotype Poikiloderma / facial rash Hallmark feature; rash typically begins between 3–10 months (Martins) or usually 3–6 months / within first year (Larizza), spreads from face to extremities and spares trunk Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 1-2); Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1186/1750-1172-5-2 HPO: Poikiloderma HP:0001003; UBERON: skin of face / skin of upper limb / lower limb
Phenotype Poikiloderma frequency by gene group RECQL4 41/43; ANAPC1 11/11; CRIPT 4/4; DNA2 7/7 in Martins table Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 3-4) https://doi.org/10.3389/fragi.2023.1296409 Cross-gene hallmark of RTS spectrum
Phenotype Sparse hair / eyebrows / eyelashes Highly prevalent; by gene group RECQL4 29/43, ANAPC1 10/11, CRIPT 5/5, DNA2 7/7 Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 3-4) https://doi.org/10.3389/fragi.2023.1296409 HPO: Sparse scalp hair HP:0008070; Sparse eyebrow HP:0045075; Sparse eyelashes HP:0000653
Phenotype Short stature / growth failure Common across RTS spectrum; RECQL4 34/43 with prenatal short stature reported, ANAPC1 7/11, CRIPT 6/6, DNA2 7/7 Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 3-4) https://doi.org/10.3389/fragi.2023.1296409 HPO: Short stature HP:0004322; prenatal onset where applicable
Phenotype Cataracts Bilateral juvenile cataracts are cardinal in classic RTS descriptions; cataracts nearly exclusive to ANAPC1 and DNA2 groups in Martins table: ANAPC1 10/10 juvenile; DNA2 7/7, 6/7 congenital; RECQL4 0/26 in table Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3, martins2023rothmundthomsonsyndromea pages 3-4); Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1186/1750-1172-5-2 HPO: Cataract HP:0000518; juvenile cataract / congenital cataract subtypes
Phenotype Skeletal abnormalities Includes radial ray defects, patella hypoplasia/aplasia, osteopenia, irregular metaphyses, joint dislocations; RECQL4 group particularly prone to radial ray defects (14/40 in Martins table) Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3, martins2023rothmundthomsonsyndromea pages 3-4); Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1186/1750-1172-5-2 HPO: Radial ray defect HP:0004074; Osteopenia HP:0000938
Phenotype Neurodevelopment Usually normal in classic RECQL4 RTS, but CRIPT-related RTS spectrum shows developmental delay/seizures and severe speech compromise in all six updated cases Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3, martins2023rothmundthomsonsyndromea pages 3-4) https://doi.org/10.3389/fragi.2023.1296409 HPO: Developmental delay HP:0001263; Seizure HP:0001250
Cancer risk Osteosarcoma Estimated prevalence/risk ~30%; median age 11.5 years; only clearly observed in RECQL4 group in current cross-gene review Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3, martins2023rothmundthomsonsyndromea pages 3-4) https://doi.org/10.3389/fragi.2023.1296409 HPO/DO: osteosarcoma; UBERON: bone tissue
Cancer risk Skin cancer Estimated prevalence ~5%; includes squamous cell carcinoma, basal cell carcinoma, Bowen disease in reported literature Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3); Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1186/1750-1172-5-2 UBERON: skin; dermatologic surveillance concept
Cancer risk RECQL4 genotype–cancer correlation Variants damaging the helicase domain are enriched among patients with cancer outcome; strict oncologic surveillance recommended Colombo 2018, IJMS (colombo2018rothmundthomsonsyndromeinsights pages 1-3) https://doi.org/10.3390/ijms19041103 Variant class/region may inform risk stratification
Risk factors Heterozygous RECQL4 LOF and pediatric osteosarcoma In 5,562 pediatric cancer patients, 24/5562 (0.43%) had RECQL4 LOF; 5/249 osteosarcoma cases (2.0%) carried LOF; enrichment vs gnomAD: OR 7.1, 95% CI 2.9–17, P=0.00087 Maciaszek 2019, Cold Spring Harbor Molecular Case Studies (maciaszek2019enrichmentofheterozygous pages 1-2, maciaszek2019enrichmentofheterozygous pages 4-5, maciaszek2019enrichmentofheterozygous pages 8-10) https://doi.org/10.1101/mcs.a004218 Germline susceptibility evidence; not diagnostic of RTS itself
Risk factors Recurrent RECQL4 variant in cancer cohort c.1573delT (p.Cys525Alafs) present in 9/24 (38%) RECQL4 LOF-positive pediatric cancer patients; enriched vs gnomAD (P=0.0024, OR 3.3, 95% CI 1.7–6.7) Maciaszek 2019, Cold Spring Harbor Molecular Case Studies (maciaszek2019enrichmentofheterozygous pages 1-2, maciaszek2019enrichmentofheterozygous pages 6-8) https://doi.org/10.1101/mcs.a004218 Supports helicase-domain disruption as relevant to oncogenesis
Bone / morbidity Fracture burden and low BMD In 29 RTS individuals: fractures in 45% of children (9/20) and 67% of adults (6/9); among those with fracture, 67% (10/15) had ≥2 fractures; RECQL4 status RR 5.32 for fracture count (95% CI 2.27–15.68) Cao 2017, Human Molecular Genetics (cao2017generalizedmetabolicbone pages 1-2, cao2017generalizedmetabolicbone pages 6-7) https://doi.org/10.1093/hmg/ddx178 HPO: Fracture HP:0002757; low bone density/osteopenia
Mechanism / pathophysiology RECQL4 core biology RECQL4 is a genome-maintenance helicase family member with roles in DNA replication and repair; RTS is a genome instability disorder Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 1-2, martins2023rothmundthomsonsyndromea pages 6-7); Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 ; https://doi.org/10.1186/1750-1172-5-2 GO: DNA replication, DNA repair, genome stability
Mechanism / omics RTS osteoblast metabolic signature Patient-derived iPSC osteoblasts showed defective osteogenic differentiation, increased mitochondrial respiratory complex I function, increased OXPHOS/ATP, and sensitivity to complex I inhibitor IACS-010759 Jewell 2021, PLOS Genetics (jewell2021patientderivedipscslink pages 1-2, jewell2021patientderivedipscslink pages 11-13) https://doi.org/10.1371/journal.pgen.1009971 GO: oxidative phosphorylation; cell type: osteoblast CL term suggestion
Recent development (2023) DNA2-related RTS spectrum 8 individuals (6 Brazilian probands + 2 Swiss/Portuguese siblings) with poikiloderma, congenital cataracts, severe growth failure; biallelic DNA2 variants with shared deep intronic founder-like allele; reduced DNA2 protein and impaired DSB repair Filho 2023, Journal of Medical Genetics (filho2023biallelicvariantsin pages 1-1, filho2023biallelicvariantsin pages 5-5, filho2023estudogenéticode pages 40-44) https://doi.org/10.1136/jmg-2022-109119 HPO: congenital cataract, short stature, poikiloderma; GO: double-strand break repair
Recent development (2023) CRIPT-related RTS-like syndrome Biallelic CRIPT variants linked to RTS-like phenotype with neurologic involvement; in Martins summary, 6 individuals had developmental delay/severe speech compromise, frequent seizures, osteopenia/metaphyseal striations, sparse hair, pigmentary skin changes Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3, martins2023rothmundthomsonsyndromea pages 3-4) https://doi.org/10.3389/fragi.2023.1296409 Helps expand differential diagnosis for RECQL4-negative RTS presentations
Diagnostics Clinical diagnosis Poikiloderma plus additional findings used clinically; Martins cites diagnostic guidance requiring poikiloderma plus ≥2 features (e.g., cataracts, dental, GI, hyperkeratosis, cancer, nail/skeletal abnormalities, small stature, sparse hair) Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 1-2) https://doi.org/10.3389/fragi.2023.1296409 HPO-driven phenotyping helpful
Diagnostics Molecular testing strategy RECQL4 sequencing remains central for RTS2; exome/WGS helped identify ANAPC1, DNA2, and CRIPT in RECQL4-negative cases; transcript analysis may be needed to detect intronic/splicing defects Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2); Zirn 2021, Skin Health and Disease (zirn2021rothmund–thomsonsyndrometype pages 1-2); Martins 2023, Frontiers in Aging (martins2023rothmundthomsonsyndromea pages 2-3) https://doi.org/10.1186/1750-1172-5-2 ; https://doi.org/10.1002/ski2.12 ; https://doi.org/10.3389/fragi.2023.1296409 Consider gene panels, WES/WGS, RNA studies
Management / implementation Surveillance and multidisciplinary care Cancer surveillance recommended for RTS2; subtype-specific care includes ophthalmologic surveillance for RTS1 and multidisciplinary long-term follow-up Larizza 2010, Orphanet Journal of Rare Diseases (larizza2010rothmundthomsonsyndrome pages 1-2); Zirn 2021, Skin Health and Disease (zirn2021rothmund–thomsonsyndrometype pages 1-2) https://doi.org/10.1186/1750-1172-5-2 ; https://doi.org/10.1002/ski2.12 MAXO suggestions: ophthalmologic monitoring, cancer surveillance, genetic counseling
Management / implementation Bone health measures Baseline DXA at diagnosis, maintain fracture history, calcium/vitamin D per guidelines, bisphosphonates may be considered for multiple/serious fractures; avoid teriparatide because of osteosarcoma risk Cao 2017, Human Molecular Genetics (cao2017generalizedmetabolicbone pages 6-7) https://doi.org/10.1093/hmg/ddx178 MAXO: bone density assessment, calcium supplementation, vitamin D supplementation
Clinical research RTS-specific / related studies NCT01304407 studied calcium absorption/bone mineral density in RTS (completed; 29 participants). NCT03898817 used patient-derived hiPS cells to study RecQ helicase disorders including RTS (terminated after planned inclusion). NCT03050268 includes RTS in a childhood cancer predisposition registry ClinicalTrials.gov records (NCT01304407 chunk 1, NCT03898817 chunk 1, NCT03050268 chunk 1, NCT03050268 chunk 2) https://clinicaltrials.gov/study/NCT01304407 ; https://clinicaltrials.gov/study/NCT03898817 ; https://clinicaltrials.gov/study/NCT03050268 Real-world implementation of natural history, mechanism, and predisposition research
Prognosis Osteosarcoma outcome Five-year survival for osteosarcoma reported as ~60–70%, similar in RTS and non-RTS patients in older review Larizza 2010, Orphanet Journal of Rare Diseases (borgaonkar2020rothmundthomsonsyndrome pages 1-2, larizza2010rothmundthomsonsyndrome pages 1-2) https://doi.org/10.1186/1750-1172-5-2 Prognosis heavily influenced by cancer occurrence

Table: This table compiles key identifiers, genes, phenotypes, risks, and recent developments for Rothmund–Thomson syndrome using only currently available evidence snippets. It is useful as a compact, citation-linked reference for populating a disease knowledge base.


Key evidence excerpts (directly quotable statements from retrieved abstracts/snippets)

  • RTS hallmark and rarity (2010 Orphanet review abstract): RTS is “a genodermatosis presenting with a characteristic facial rash (poikiloderma)… transmitted in an autosomal recessive manner.” (Jan 2010; https://doi.org/10.1186/1750-1172-5-2) (larizza2010rothmundthomsonsyndrome pages 1-2)
  • Cancer risk estimates (2023 synthesis snippet): “estimated prevalence of 30% for osteosarcoma and 5% for skin cancer… Osteosarcoma… develops at a median age of 11.5 years.” (Nov 2023; https://doi.org/10.3389/fragi.2023.1296409) (martins2023rothmundthomsonsyndromea pages 2-3)
  • DNA2-related RTS-like disease (2023 JMG abstract quote): “Biallelic variants in DNA2 cause poikiloderma with congenital cataracts and severe growth failure reminiscent of Rothmund-Thomson syndrome.” (Apr 2023; https://doi.org/10.1136/jmg-2022-109119) (filho2023biallelicvariantsin pages 1-1)
  • Heterozygous RECQL4 LOF enrichment in osteosarcoma (2019 abstract quote content): pediatric OS cases showed enrichment of heterozygous RECQL4 LOF variants with OR 7.1 and P=0.00087. (Oct 2019; https://doi.org/10.1101/mcs.a004218) (maciaszek2019enrichmentofheterozygous pages 1-2)

Limitations of this report (evidence gaps from the current retrieval)

  • MONDO, Orphanet ORPHA, MeSH descriptor ID, and ICD codes could not be verified from the retrieved corpus in this run.
  • Formal QoL instrument outcomes were not retrieved.
  • Comprehensive variant catalogs (ClinVar/gnomAD allele frequencies for RTS-causal alleles) were not retrievable beyond select examples in the osteosarcoma enrichment study.

References

  1. (martins2023rothmundthomsonsyndromea pages 1-2): Davi Jardim Martins, Ricardo Di Lazzaro Filho, Debora Romeo Bertola, and Nícolas Carlos Hoch. Rothmund-thomson syndrome, a disorder far from solved. Frontiers in Aging, Nov 2023. URL: https://doi.org/10.3389/fragi.2023.1296409, doi:10.3389/fragi.2023.1296409. This article has 30 citations.

  2. (martins2023rothmundthomsonsyndromea pages 2-3): Davi Jardim Martins, Ricardo Di Lazzaro Filho, Debora Romeo Bertola, and Nícolas Carlos Hoch. Rothmund-thomson syndrome, a disorder far from solved. Frontiers in Aging, Nov 2023. URL: https://doi.org/10.3389/fragi.2023.1296409, doi:10.3389/fragi.2023.1296409. This article has 30 citations.

  3. (larizza2010rothmundthomsonsyndrome pages 1-2): Lidia Larizza, Gaia Roversi, and Ludovica Volpi. Rothmund-thomson syndrome. Orphanet Journal of Rare Diseases, 5:2-2, Jan 2010. URL: https://doi.org/10.1186/1750-1172-5-2, doi:10.1186/1750-1172-5-2. This article has 365 citations and is from a peer-reviewed journal.

  4. (martins2023rothmundthomsonsyndromea pages 3-4): Davi Jardim Martins, Ricardo Di Lazzaro Filho, Debora Romeo Bertola, and Nícolas Carlos Hoch. Rothmund-thomson syndrome, a disorder far from solved. Frontiers in Aging, Nov 2023. URL: https://doi.org/10.3389/fragi.2023.1296409, doi:10.3389/fragi.2023.1296409. This article has 30 citations.

  5. (colombo2018rothmundthomsonsyndromeinsights pages 1-3): Elisa Colombo, Andrea Locatelli, Laura Cubells Sánchez, Sara Romeo, Nursel Elcioglu, Isabelle Maystadt, Altea Esteve Martínez, Alessandra Sironi, Laura Fontana, Palma Finelli, Cristina Gervasini, Vanna Pecile, and Lidia Larizza. Rothmund-thomson syndrome: insights from new patients on the genetic variability underpinning clinical presentation and cancer outcome. International Journal of Molecular Sciences, 19:1103, Apr 2018. URL: https://doi.org/10.3390/ijms19041103, doi:10.3390/ijms19041103. This article has 37 citations.

  6. (cao2017generalizedmetabolicbone pages 1-2): Felicia Cao, Linchao Lu, Steven A. Abrams, Keli M. Hawthorne, Allison Tam, Weidong Jin, Brian Dawson, Roman Shypailo, Hao Liu, Brendan Lee, Sandesh C.S. Nagamani, and Lisa L. Wang. Generalized metabolic bone disease and fracture risk in rothmund-thomson syndrome. Human Molecular Genetics, 26:3046–3055, Aug 2017. URL: https://doi.org/10.1093/hmg/ddx178, doi:10.1093/hmg/ddx178. This article has 22 citations and is from a domain leading peer-reviewed journal.

  7. (zirn2021rothmund–thomsonsyndrometype pages 1-2): B. Zirn, U. Bernbeck, K. Alt, F. Oeffner, A. Gerhardinger, and C. Has. Rothmund–thomson syndrome type 1 caused by biallelic anapc1 gene mutations. Skin Health and Disease, Feb 2021. URL: https://doi.org/10.1002/ski2.12, doi:10.1002/ski2.12. This article has 11 citations and is from a peer-reviewed journal.

  8. (maciaszek2019enrichmentofheterozygous pages 1-2): Jamie L. Maciaszek, Ninad Oak, Wenan Chen, Kayla V. Hamilton, Rose B. McGee, Regina Nuccio, Roya Mostafavi, Stacy Hines-Dowell, Lynn Harrison, Leslie Taylor, Elsie L. Gerhardt, Annastasia Ouma, Michael N. Edmonson, Aman Patel, Joy Nakitandwe, Alberto S. Pappo, Elizabeth M. Azzato, Sheila A. Shurtleff, David W. Ellison, James R. Downing, Melissa M. Hudson, Leslie L. Robison, Victor Santana, Scott Newman, Jinghui Zhang, Zhaoming Wang, Gang Wu, Kim E. Nichols, and Chimene A. Kesserwan. Enrichment of heterozygous germline recql4 loss-of-function variants in pediatric osteosarcoma. Cold Spring Harbor Molecular Case Studies, 5:a004218, Oct 2019. URL: https://doi.org/10.1101/mcs.a004218, doi:10.1101/mcs.a004218. This article has 22 citations and is from a peer-reviewed journal.

  9. (maciaszek2019enrichmentofheterozygous pages 4-5): Jamie L. Maciaszek, Ninad Oak, Wenan Chen, Kayla V. Hamilton, Rose B. McGee, Regina Nuccio, Roya Mostafavi, Stacy Hines-Dowell, Lynn Harrison, Leslie Taylor, Elsie L. Gerhardt, Annastasia Ouma, Michael N. Edmonson, Aman Patel, Joy Nakitandwe, Alberto S. Pappo, Elizabeth M. Azzato, Sheila A. Shurtleff, David W. Ellison, James R. Downing, Melissa M. Hudson, Leslie L. Robison, Victor Santana, Scott Newman, Jinghui Zhang, Zhaoming Wang, Gang Wu, Kim E. Nichols, and Chimene A. Kesserwan. Enrichment of heterozygous germline recql4 loss-of-function variants in pediatric osteosarcoma. Cold Spring Harbor Molecular Case Studies, 5:a004218, Oct 2019. URL: https://doi.org/10.1101/mcs.a004218, doi:10.1101/mcs.a004218. This article has 22 citations and is from a peer-reviewed journal.

  10. (maciaszek2019enrichmentofheterozygous pages 8-10): Jamie L. Maciaszek, Ninad Oak, Wenan Chen, Kayla V. Hamilton, Rose B. McGee, Regina Nuccio, Roya Mostafavi, Stacy Hines-Dowell, Lynn Harrison, Leslie Taylor, Elsie L. Gerhardt, Annastasia Ouma, Michael N. Edmonson, Aman Patel, Joy Nakitandwe, Alberto S. Pappo, Elizabeth M. Azzato, Sheila A. Shurtleff, David W. Ellison, James R. Downing, Melissa M. Hudson, Leslie L. Robison, Victor Santana, Scott Newman, Jinghui Zhang, Zhaoming Wang, Gang Wu, Kim E. Nichols, and Chimene A. Kesserwan. Enrichment of heterozygous germline recql4 loss-of-function variants in pediatric osteosarcoma. Cold Spring Harbor Molecular Case Studies, 5:a004218, Oct 2019. URL: https://doi.org/10.1101/mcs.a004218, doi:10.1101/mcs.a004218. This article has 22 citations and is from a peer-reviewed journal.

  11. (maciaszek2019enrichmentofheterozygous pages 6-8): Jamie L. Maciaszek, Ninad Oak, Wenan Chen, Kayla V. Hamilton, Rose B. McGee, Regina Nuccio, Roya Mostafavi, Stacy Hines-Dowell, Lynn Harrison, Leslie Taylor, Elsie L. Gerhardt, Annastasia Ouma, Michael N. Edmonson, Aman Patel, Joy Nakitandwe, Alberto S. Pappo, Elizabeth M. Azzato, Sheila A. Shurtleff, David W. Ellison, James R. Downing, Melissa M. Hudson, Leslie L. Robison, Victor Santana, Scott Newman, Jinghui Zhang, Zhaoming Wang, Gang Wu, Kim E. Nichols, and Chimene A. Kesserwan. Enrichment of heterozygous germline recql4 loss-of-function variants in pediatric osteosarcoma. Cold Spring Harbor Molecular Case Studies, 5:a004218, Oct 2019. URL: https://doi.org/10.1101/mcs.a004218, doi:10.1101/mcs.a004218. This article has 22 citations and is from a peer-reviewed journal.

  12. (martins2023rothmundthomsonsyndromea media 879ff8e8): Davi Jardim Martins, Ricardo Di Lazzaro Filho, Debora Romeo Bertola, and Nícolas Carlos Hoch. Rothmund-thomson syndrome, a disorder far from solved. Frontiers in Aging, Nov 2023. URL: https://doi.org/10.3389/fragi.2023.1296409, doi:10.3389/fragi.2023.1296409. This article has 30 citations.

  13. (martins2023rothmundthomsonsyndromea media c362ed4d): Davi Jardim Martins, Ricardo Di Lazzaro Filho, Debora Romeo Bertola, and Nícolas Carlos Hoch. Rothmund-thomson syndrome, a disorder far from solved. Frontiers in Aging, Nov 2023. URL: https://doi.org/10.3389/fragi.2023.1296409, doi:10.3389/fragi.2023.1296409. This article has 30 citations.

  14. (filho2023biallelicvariantsin pages 1-1): Ricardo Di Lazzaro Filho, Guilherme Lopes Yamamoto, Tiago J Silva, Leticia A Rocha, Bianca D W Linnenkamp, Matheus Augusto Araújo Castro, Deborah Bartholdi, André Schaller, Tosso Leeb, Samantha Kelmann, Claudia Y Utagawa, Carlos E Steiner, Leandra Steinmetz, Rachel Sayuri Honjo, Chong Ae Kim, Lisa Wang, Raphaël Abourjaili-Bilodeau, Philippe M Campeau, Matthew Warman, Maria Rita Passos-Bueno, Nicolas C Hoch, and Debora Romeo Bertola. Biallelic variants in dna2 cause poikiloderma with congenital cataracts and severe growth failure reminiscent of rothmund-thomson syndrome. Journal of Medical Genetics, 60:1127-1132, Apr 2023. URL: https://doi.org/10.1136/jmg-2022-109119, doi:10.1136/jmg-2022-109119. This article has 20 citations and is from a domain leading peer-reviewed journal.

  15. (filho2023biallelicvariantsin pages 5-5): Ricardo Di Lazzaro Filho, Guilherme Lopes Yamamoto, Tiago J Silva, Leticia A Rocha, Bianca D W Linnenkamp, Matheus Augusto Araújo Castro, Deborah Bartholdi, André Schaller, Tosso Leeb, Samantha Kelmann, Claudia Y Utagawa, Carlos E Steiner, Leandra Steinmetz, Rachel Sayuri Honjo, Chong Ae Kim, Lisa Wang, Raphaël Abourjaili-Bilodeau, Philippe M Campeau, Matthew Warman, Maria Rita Passos-Bueno, Nicolas C Hoch, and Debora Romeo Bertola. Biallelic variants in dna2 cause poikiloderma with congenital cataracts and severe growth failure reminiscent of rothmund-thomson syndrome. Journal of Medical Genetics, 60:1127-1132, Apr 2023. URL: https://doi.org/10.1136/jmg-2022-109119, doi:10.1136/jmg-2022-109119. This article has 20 citations and is from a domain leading peer-reviewed journal.

  16. (filho2023estudogenéticode pages 40-44): Ricardo Di Lazzaro Filho. Estudo genético de pacientes com síndrome de rothmund-thomson. ArXiv, 2023. URL: https://doi.org/10.11606/t.41.2023.tde-07122023-164841, doi:10.11606/t.41.2023.tde-07122023-164841. This article has 0 citations.

  17. (martins2023rothmundthomsonsyndromea pages 6-7): Davi Jardim Martins, Ricardo Di Lazzaro Filho, Debora Romeo Bertola, and Nícolas Carlos Hoch. Rothmund-thomson syndrome, a disorder far from solved. Frontiers in Aging, Nov 2023. URL: https://doi.org/10.3389/fragi.2023.1296409, doi:10.3389/fragi.2023.1296409. This article has 30 citations.

  18. (cao2017generalizedmetabolicbone pages 6-7): Felicia Cao, Linchao Lu, Steven A. Abrams, Keli M. Hawthorne, Allison Tam, Weidong Jin, Brian Dawson, Roman Shypailo, Hao Liu, Brendan Lee, Sandesh C.S. Nagamani, and Lisa L. Wang. Generalized metabolic bone disease and fracture risk in rothmund-thomson syndrome. Human Molecular Genetics, 26:3046–3055, Aug 2017. URL: https://doi.org/10.1093/hmg/ddx178, doi:10.1093/hmg/ddx178. This article has 22 citations and is from a domain leading peer-reviewed journal.

  19. (cao2017generalizedmetabolicbone pages 5-6): Felicia Cao, Linchao Lu, Steven A. Abrams, Keli M. Hawthorne, Allison Tam, Weidong Jin, Brian Dawson, Roman Shypailo, Hao Liu, Brendan Lee, Sandesh C.S. Nagamani, and Lisa L. Wang. Generalized metabolic bone disease and fracture risk in rothmund-thomson syndrome. Human Molecular Genetics, 26:3046–3055, Aug 2017. URL: https://doi.org/10.1093/hmg/ddx178, doi:10.1093/hmg/ddx178. This article has 22 citations and is from a domain leading peer-reviewed journal.

  20. (jewell2021patientderivedipscslink pages 1-2): Brittany E. Jewell, An Xu, Dandan Zhu, Mo-Fan Huang, Linchao Lu, Mo Liu, Erica L. Underwood, Jun Hyoung Park, Huihui Fan, Julian A. Gingold, Ruoji Zhou, Jian Tu, Zijun Huo, Ying Liu, Weidong Jin, Yi-Hung Chen, Yitian Xu, Shu-Hsia Chen, Nino Rainusso, Nathaniel K. Berg, Danielle A. Bazer, Christopher Vellano, Philip Jones, Holger K. Eltzschig, Zhongming Zhao, Benny Abraham Kaipparettu, Ruiying Zhao, Lisa L. Wang, and Dung-Fang Lee. Patient-derived ipscs link elevated mitochondrial respiratory complex i function to osteosarcoma in rothmund-thomson syndrome. PLOS Genetics, 17:e1009971, Dec 2021. URL: https://doi.org/10.1371/journal.pgen.1009971, doi:10.1371/journal.pgen.1009971. This article has 20 citations and is from a domain leading peer-reviewed journal.

  21. (jewell2021patientderivedipscslink pages 11-13): Brittany E. Jewell, An Xu, Dandan Zhu, Mo-Fan Huang, Linchao Lu, Mo Liu, Erica L. Underwood, Jun Hyoung Park, Huihui Fan, Julian A. Gingold, Ruoji Zhou, Jian Tu, Zijun Huo, Ying Liu, Weidong Jin, Yi-Hung Chen, Yitian Xu, Shu-Hsia Chen, Nino Rainusso, Nathaniel K. Berg, Danielle A. Bazer, Christopher Vellano, Philip Jones, Holger K. Eltzschig, Zhongming Zhao, Benny Abraham Kaipparettu, Ruiying Zhao, Lisa L. Wang, and Dung-Fang Lee. Patient-derived ipscs link elevated mitochondrial respiratory complex i function to osteosarcoma in rothmund-thomson syndrome. PLOS Genetics, 17:e1009971, Dec 2021. URL: https://doi.org/10.1371/journal.pgen.1009971, doi:10.1371/journal.pgen.1009971. This article has 20 citations and is from a domain leading peer-reviewed journal.

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  26. (salih2018rothmundthomsonsyndrome(rts) pages 1-2): Anas Salih, Susumu Inoue, and Nkechi Onwuzurike. Rothmund-thomson syndrome (rts) with osteosarcoma due to recql4 mutation. BMJ Case Reports, 2018:bcr-2017-222384, Jan 2018. URL: https://doi.org/10.1136/bcr-2017-222384, doi:10.1136/bcr-2017-222384. This article has 21 citations and is from a peer-reviewed journal.

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Artifacts