CD27-related lymphoproliferative and immune disorder is an autosomal recessive inborn error of immunity caused by biallelic loss-of-function variants in TNFRSF7/CD27. The disease is characterized by defective CD27-CD70 costimulation, impaired control of Epstein-Barr virus, hypogammaglobulinemia, and a variable spectrum of EBV-driven immune dysregulation ranging from persistent viremia to hemophagocytic lymphohistiocytosis, lymphoproliferative disease, and lymphoma. Most reported patients are EBV-positive at diagnosis, and lymphoproliferation, lymphoma, and autoinflammatory features dominate the clinical course.
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Conditions with similar clinical presentations that must be differentiated from CD27-related lymphoproliferative and immune disorder:
name: CD27-related lymphoproliferative and immune disorder
creation_date: "2026-04-16T00:00:00Z"
updated_date: "2026-04-20T00:00:00Z"
category: Mendelian
synonyms:
- CD27 deficiency
- TNFRSF7 deficiency
- lymphoproliferative syndrome 2
- LPFS2
- CD27 lymphoproliferative syndrome
- combined immunodeficiency due to CD27 deficiency
disease_term:
preferred_term: CD27-related lymphoproliferative and immune disorder
term:
id: MONDO:0014054
label: lymphoproliferative syndrome 2
parents:
- Primary Immunodeficiency
- Combined immunodeficiency
- Lymphoproliferative Disorder
description: >-
CD27-related lymphoproliferative and immune disorder is an autosomal recessive
inborn error of immunity caused by biallelic loss-of-function variants in
TNFRSF7/CD27. The disease is characterized by defective CD27-CD70
costimulation, impaired control of Epstein-Barr virus, hypogammaglobulinemia,
and a variable spectrum of EBV-driven immune dysregulation ranging from
persistent viremia to hemophagocytic lymphohistiocytosis, lymphoproliferative
disease, and lymphoma. Most reported patients are EBV-positive at diagnosis,
and lymphoproliferation, lymphoma, and autoinflammatory features dominate the
clinical course.
inheritance:
- name: Autosomal recessive
description: >-
CD27-related lymphoproliferative and immune disorder is caused by biallelic
TNFRSF7/CD27 variants, most often homozygous loss-of-function alleles but
also compound heterozygous variant combinations.
inheritance_term:
preferred_term: Autosomal recessive inheritance
term:
id: HP:0000007
label: Autosomal recessive inheritance
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
We report the simultaneous confirmation of human CD27 deficiency in 3
independent families (8 patients) due to a homozygous mutation
(p. Cys53Tyr) revealed by whole exome sequencing, leading to disruption
of an evolutionarily conserved cystein knot motif of the transmembrane
receptor.
explanation: >-
Multiple unrelated families with homozygous CD27 variants support
autosomal recessive inheritance.
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
4 novel mutations were identified: homozygous missense c.G287A/p.C96Y
explanation: >-
The expanded mutational spectrum shows that disease results from biallelic
CD27 loss-of-function genotypes.
prevalence: []
pathophysiology:
- name: Loss of CD27-CD70 costimulation
description: >-
Biallelic CD27/TNFRSF7 variants reduce or abolish cell-surface CD27 and
disrupt CD27-CD70 signaling. This removes a key TNF-receptor-family
costimulatory input required for effective adaptive antiviral responses.
genes:
- preferred_term: CD27
term:
id: hgnc:11922
label: CD27
cell_types:
- preferred_term: CD8-positive alpha-beta T cell
term:
id: CL:0000625
label: CD8-positive, alpha-beta T cell
biological_processes:
- preferred_term: T cell costimulation
term:
id: GO:0031295
label: T cell costimulation
modifier: DECREASED
evidence:
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Expression of cell-surface and soluble CD27 was significantly reduced in
patients and heterozygous family members.
explanation: >-
Human patient immunophenotyping shows that TNFRSF7 variants reduce CD27
expression, establishing the primary receptor-level defect.
- reference: PMID:33827115
reference_title: "CD27 is required for protective lytic EBV antigen-specific CD8+ T-cell expansion."
supports: SUPPORT
evidence_source: MODEL_ORGANISM
snippet: >-
This suggests that CD27 is not required for all CD8+ T-cell expansions
and cytotoxicity but is required for a subset of CD8+ T-cell responses
that protect us from EBV pathology.
explanation: >-
Humanized-mouse experiments directly support CD27 as a protective
costimulatory signal for EBV-specific CD8 T-cell immunity.
downstream:
- target: Impaired EBV-specific cytotoxic T-cell immunity
description: Loss of CD27 costimulation weakens the antiviral CD8 T-cell response to EBV.
causal_link_type: DIRECT
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
CD27, a tumor necrosis factor receptor family member, interacts with
CD70 and influences T-, B- and NK-cell functions. Disturbance of this
axis impairs immunity and memory generation against viruses including
Epstein Barr virus (EBV), influenza, and others.
explanation: >-
Establishes that disrupted CD27-CD70 signaling impairs T-cell immunity
against EBV, supporting the causal link from lost costimulation to
impaired EBV-specific CD8 T-cell responses.
- target: Reduced innate cytotoxic lymphocyte function
description: Loss of CD27 signaling also weakens NK and iNKT-cell mediated antiviral surveillance.
causal_link_type: DIRECT
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
In severely affected patients, numbers of iNKT cells and NK-cell
function were reduced.
explanation: >-
Demonstrates that CD27 loss leads to reduced iNKT cell numbers and
impaired NK function in severely affected patients, supporting the
causal link from disrupted CD27-CD70 signaling to innate cytotoxic
lymphocyte dysfunction.
- target: Impaired T cell-dependent humoral immunity
description: CD27 loss also disrupts helper-dependent B-cell maturation and antibody generation.
causal_link_type: DIRECT
evidence:
- reference: PMID:22197273
reference_title: "CD27 deficiency is associated with combined immunodeficiency and persistent symptomatic EBV viremia."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Immunologically, lack of CD27 expression was associated with impaired T
cell-dependent B-cell responses and T-cell dysfunction.
explanation: >-
The original CD27-deficient sibling pair directly links loss of CD27
expression to impaired T cell-dependent B-cell responses, supporting
the causal downstream edge.
- name: Reduced innate cytotoxic lymphocyte function
description: >-
In severely affected CD27-deficient patients, innate cytotoxic lymphocyte
compartments are also compromised, with reduced NK-cell function and fewer
invariant NKT cells further weakening antiviral immune surveillance.
cell_types:
- preferred_term: natural killer cell
term:
id: CL:0000623
label: natural killer cell
biological_processes:
- preferred_term: natural killer cell mediated cytotoxicity
term:
id: GO:0042267
label: natural killer cell mediated cytotoxicity
modifier: DECREASED
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
In severely affected patients, numbers of iNKT cells and NK-cell
function were reduced.
explanation: >-
Human CD27 deficiency can impair innate cytotoxic lymphocyte function in
addition to adaptive antiviral immunity, broadening the mechanistic basis
of EBV susceptibility.
downstream:
- target: Persistent symptomatic EBV viremia
description: Reduced innate cytotoxic control contributes to incomplete containment of EBV infection.
causal_link_type: INDIRECT_KNOWN_INTERMEDIATES
evidence:
- reference: PMID:22197273
reference_title: "CD27 deficiency is associated with combined immunodeficiency and persistent symptomatic EBV viremia."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Both patients had persistent symptomatic EBV viremia.
explanation: >-
The original CD27-deficient siblings exhibited persistent symptomatic
EBV viremia, consistent with the downstream link from reduced innate
cytotoxic control to sustained viral replication.
- target: EBV-driven lymphoproliferation and hyperinflammation
description: Weakened NK and iNKT-cell surveillance further permits EBV-driven immune pathology.
causal_link_type: INDIRECT_KNOWN_INTERMEDIATES
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
our findings suggest that lack of functional CD27 predisposes towards a
combined immunodeficiency associated with potentially fatal EBV-driven
hemo-phagocytosis, lymphoproliferation, and lymphoma development.
explanation: >-
Directly links functional CD27 loss, which includes reduced innate
cytotoxic lymphocyte function, to EBV-driven hyperinflammatory and
lymphoproliferative pathology.
- name: Impaired EBV-specific cytotoxic T-cell immunity
description: >-
CD27 deficiency compromises expansion and effector differentiation of
protective EBV-specific CD8-positive T cells, especially lytic antigen
responses, allowing persistent EBV infection and defective clearance of
EBV-transformed B cells.
cell_types:
- preferred_term: CD8-positive alpha-beta T cell
term:
id: CL:0000625
label: CD8-positive, alpha-beta T cell
biological_processes:
- preferred_term: T cell proliferation
term:
id: GO:0042098
label: T cell proliferation
modifier: DECREASED
- preferred_term: T cell activation
term:
id: GO:0042110
label: T cell activation
modifier: DECREASED
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Detailed immunological characterization revealed aberrant generation of
memory B and T cells, including a paucity of EBV-specific T cells, and
impaired effector function of CD8+ T cells, thereby providing mechanistic
insight into cellular defects underpinning the clinical features of
disrupted CD27/CD70 signaling.
explanation: >-
The multinational cohort directly links CD27 deficiency to deficient
EBV-specific T-cell generation and impaired CD8 effector function.
- reference: PMID:33827115
reference_title: "CD27 is required for protective lytic EBV antigen-specific CD8+ T-cell expansion."
supports: SUPPORT
evidence_source: MODEL_ORGANISM
snippet: >-
While overall CD8+ T-cell expansion and composition are unaltered after
antibody blocking of CD27, only some EBV-specific CD8+ T-cell responses,
exemplified by early lytic EBV antigen BMLF1-specific CD8+ T cells, are
inhibited in their proliferation and killing of EBV-transformed B cells.
explanation: >-
This functional model shows that CD27 signaling is specifically required
for the EBV-directed CD8 response that restrains transformed B cells.
downstream:
- target: Persistent symptomatic EBV viremia
description: Failure of EBV-specific cytotoxic immunity permits sustained viral replication.
causal_link_type: DIRECT
evidence:
- reference: PMID:33827115
reference_title: "CD27 is required for protective lytic EBV antigen-specific CD8+ T-cell expansion."
supports: SUPPORT
evidence_source: MODEL_ORGANISM
snippet: >-
While overall CD8+ T-cell expansion and composition are unaltered after
antibody blocking of CD27, only some EBV-specific CD8+ T-cell responses,
exemplified by early lytic EBV antigen BMLF1-specific CD8+ T cells, are
inhibited in their proliferation and killing of EBV-transformed B cells.
explanation: >-
Functional evidence that blocking CD27 signaling impairs EBV-specific
CD8 T-cell proliferation and killing of EBV-transformed B cells,
supporting the downstream link to failure of viral control.
- target: EBV-driven lymphoproliferation and hyperinflammation
description: Persistent viral burden promotes uncontrolled EBV-associated immune pathology.
causal_link_type: INDIRECT_KNOWN_INTERMEDIATES
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Phenotypes varied from asymptomatic memory B-cell deficiency (n=3) to
EBV-associated hemophagocytosis and lymphoproliferative disorder
(LPD; n=3) and malignant lymphoma (n=2; +1 after LPD).
explanation: >-
Cohort data show that defective EBV-specific cytotoxicity in CD27
deficiency progresses to EBV-associated hemophagocytosis,
lymphoproliferation, and lymphoma.
- name: Impaired T cell-dependent humoral immunity
description: >-
CD27 deficiency impairs T cell-dependent B-cell responses, memory B-cell
generation, and antibody production. This produces hypogammaglobulinemia
and contributes to recurrent infection susceptibility.
cell_types:
- preferred_term: B cell
term:
id: CL:0000236
label: B cell
- preferred_term: memory B cell
term:
id: CL:0000787
label: memory B cell
biological_processes:
- preferred_term: B cell differentiation
term:
id: GO:0030183
label: B cell differentiation
modifier: DECREASED
- preferred_term: isotype switching
term:
id: GO:0045190
label: isotype switching
modifier: DECREASED
evidence:
- reference: PMID:22197273
reference_title: "CD27 deficiency is associated with combined immunodeficiency and persistent symptomatic EBV viremia."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Immunologically, lack of CD27 expression was associated with impaired T
cell-dependent B-cell responses and T-cell dysfunction.
explanation: >-
The original CD27-deficient sibling pair establishes impaired helper
dependent B-cell responses as a core immune mechanism.
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Phenotypes varied from asymptomatic memory B-cell deficiency (n=3) to
EBV-associated hemophagocytosis and lymphoproliferative disorder
(LPD; n=3) and malignant lymphoma (n=2; +1 after LPD).
explanation: >-
Some affected individuals initially present with isolated memory B-cell
deficiency, showing that impaired post-germinal-center B-cell maturation
is a core manifestation even before overt EBV-driven complications.
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Following EBV infection, hypogammaglobulinemia developed in at least 3 of
the affected individuals, while specific anti-viral and
anti-polysaccharide antibodies and EBV-specific T-cell responses were
detectable.
explanation: >-
This cohort links CD27 deficiency to acquired humoral failure after EBV
infection, including hypogammaglobulinemia and deficient immune memory.
downstream:
- target: Hypogammaglobulinemia
description: Impaired B-cell maturation lowers serum immunoglobulin levels.
causal_link_type: DIRECT
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Following EBV infection, hypogammaglobulinemia developed in at least 3
of the affected individuals, while specific anti-viral and
anti-polysaccharide antibodies and EBV-specific T-cell responses were
detectable.
explanation: >-
Shows that impaired T cell-dependent B-cell responses in CD27 deficiency
result in hypogammaglobulinemia following EBV infection.
- target: Recurrent infections
description: Weak antibody-mediated immunity increases susceptibility to repeated infection.
causal_link_type: INDIRECT_KNOWN_INTERMEDIATES
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Detailed immunological characterization revealed aberrant generation of
memory B and T cells, including a paucity of EBV-specific T cells, and
impaired effector function of CD8+ T cells, thereby providing
mechanistic insight into cellular defects underpinning the clinical
features of disrupted CD27/CD70 signaling.
explanation: >-
Aberrant memory B-cell generation mechanistically underpins the recurrent
infection susceptibility observed in CD27 deficiency.
- name: EBV-driven lymphoproliferation and hyperinflammation
description: >-
Loss of CD27-mediated immune surveillance leaves EBV insufficiently
controlled, predisposing to lymphoproliferative disease, HLH-like
hyperinflammation, and malignant lymphoma.
cell_types:
- preferred_term: B cell
term:
id: CL:0000236
label: B cell
biological_processes:
- preferred_term: lymphocyte proliferation
term:
id: GO:0046651
label: lymphocyte proliferation
modifier: INCREASED
- preferred_term: inflammatory response
term:
id: GO:0006954
label: inflammatory response
modifier: INCREASED
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Since homozygosity mapping and exome sequencing did not reveal additional
modifying factors, our findings suggest that lack of functional CD27
predisposes towards a combined immunodeficiency associated with
potentially fatal EBV-driven hemo-phagocytosis, lymphoproliferation, and
lymphoma development.
explanation: >-
The early CD27-deficiency cohort directly ties the upstream signaling
defect to EBV-driven lymphoproliferation, hyperinflammation, and lymphoma.
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Lymphoproliferation and lymphoma were the main clinical manifestations
(70% and 43%, respectively), and 9 of the CD27-deficient patients
developed HLH.
explanation: >-
The largest CD27/CD70 cohort quantifies the major EBV-driven clinical
outcomes and confirms HLH as a recurrent complication in CD27 deficiency.
downstream:
- target: Lymphoproliferative disorder
description: Uncontrolled EBV-driven B-cell expansion manifests clinically as lymphoproliferative disorder.
causal_link_type: DIRECT
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Lymphoproliferation and lymphoma were the main clinical manifestations
(70% and 43%, respectively), and 9 of the CD27-deficient patients
developed HLH.
explanation: >-
The largest CD27/CD70 cohort quantifies lymphoproliferation as the
dominant clinical manifestation of EBV-driven immune pathology.
- target: Hemophagocytosis
description: Hyperinflammatory immune activation can culminate in HLH-like hemophagocytosis.
causal_link_type: DIRECT
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
9 of the CD27-deficient patients developed HLH.
explanation: >-
The multinational cohort documents HLH as a recurrent outcome in
CD27-deficient patients, supporting the downstream progression from
EBV-driven hyperinflammation to hemophagocytic syndrome.
- target: Lymphoma
description: Chronic EBV-driven lymphoid proliferation increases risk of malignant lymphoma.
causal_link_type: DIRECT
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
our findings suggest that lack of functional CD27 predisposes towards a
combined immunodeficiency associated with potentially fatal EBV-driven
hemo-phagocytosis, lymphoproliferation, and lymphoma development.
explanation: >-
Directly supports progression from EBV-driven lymphoproliferation to
malignant lymphoma in CD27 deficiency.
phenotypes:
- name: Combined immunodeficiency
category: Immunologic
diagnostic: true
description: >-
CD27 deficiency presents as a combined immunodeficiency with both T-cell and
B-cell dysfunction.
phenotype_term:
preferred_term: Combined immunodeficiency
term:
id: HP:0005387
label: Combined immunodeficiency
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Since homozygosity mapping and exome sequencing did not reveal additional
modifying factors, our findings suggest that lack of functional CD27
predisposes towards a combined immunodeficiency associated with
potentially fatal EBV-driven hemo-phagocytosis, lymphoproliferation, and
lymphoma development.
explanation: >-
The defining syndrome is explicitly described as a combined
immunodeficiency caused by lack of functional CD27.
- name: Persistent symptomatic EBV viremia
category: Infectious
diagnostic: true
description: >-
Persistent or chronic active Epstein-Barr virus infection is one of the
most characteristic manifestations of CD27 deficiency.
phenotype_term:
preferred_term: persistent symptomatic Epstein-Barr virus viremia
term:
id: HP:0032204
label: Chronic active Epstein-Barr virus infection
evidence:
- reference: PMID:22197273
reference_title: "CD27 deficiency is associated with combined immunodeficiency and persistent symptomatic EBV viremia."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Both patients had persistent symptomatic EBV viremia.
explanation: >-
The original affected siblings establish persistent symptomatic EBV
viremia as a hallmark disease feature.
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The majority of patients (90%) were EBV+ at diagnosis
explanation: >-
The multinational series shows that EBV infection is present in nearly all
diagnosed patients even when the presentation is not classic mononucleosis.
- name: Hypogammaglobulinemia
category: Immunologic
description: >-
Reduced circulating immunoglobulin levels emerge in many affected
individuals, often after EBV infection.
phenotype_term:
preferred_term: Hypogammaglobulinemia
term:
id: HP:0004313
label: Decreased circulating immunoglobulin concentration
evidence:
- reference: PMID:22197273
reference_title: "CD27 deficiency is associated with combined immunodeficiency and persistent symptomatic EBV viremia."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The index patient was hypogammaglobulinemic, and immunoglobulin
replacement therapy was initiated.
explanation: >-
The original sibling pair directly documents clinically relevant
hypogammaglobulinemia.
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Following EBV infection, hypogammaglobulinemia developed in at least 3 of
the affected individuals, while specific anti-viral and
anti-polysaccharide antibodies and EBV-specific T-cell responses were
detectable.
explanation: >-
Additional CD27-deficient patients developed hypogammaglobulinemia after
EBV infection, showing this is a recurring humoral phenotype.
- name: Uveitis
category: Ophthalmologic
description: >-
Uveitis is a recurrent inflammatory manifestation in CD27 deficiency and is
part of the broader EBV-associated immune dysregulation phenotype.
phenotype_term:
preferred_term: Uveitis
term:
id: HP:0000554
label: Uveitis
evidence:
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
EBV-associated lymphoproliferative disease/hemophagocytic
lymphohistiocytosis, Hodgkin lymphoma, uveitis, and recurrent infections
were the predominant clinical features.
explanation: >-
The expanded clinical cohort explicitly lists uveitis among the
predominant features of CD27 deficiency.
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Twenty-one patients (43%) developed autoinflammatory features including
uveitis, arthritis, and periodic fever.
explanation: >-
The multinational cohort confirms that uveitis is a common
autoinflammatory manifestation in disrupted CD27/CD70 signaling.
- name: Arthritis
category: Musculoskeletal
description: >-
Arthritis occurs as part of the autoinflammatory phenotype reported in a
substantial subset of patients with CD27 deficiency.
phenotype_term:
preferred_term: Arthritis
term:
id: HP:0001369
label: Arthritis
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Twenty-one patients (43%) developed autoinflammatory features including
uveitis, arthritis, and periodic fever.
explanation: >-
The multinational cohort directly documents arthritis as part of the
autoinflammatory spectrum of CD27 deficiency.
- name: Recurrent fever
category: Constitutional
description: >-
Periodic or recurrent fever is part of the autoinflammatory phenotype seen
in CD27 deficiency.
phenotype_term:
preferred_term: Recurrent fever
term:
id: HP:0001954
label: Recurrent fever
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Twenty-one patients (43%) developed autoinflammatory features including
uveitis, arthritis, and periodic fever.
explanation: >-
This cohort shows that recurrent fever is a common autoinflammatory
manifestation in disrupted CD27/CD70 signaling.
- name: Lymphoproliferative disorder
category: Hematologic
diagnostic: true
description: >-
EBV-associated nonmalignant lymphoproliferation is a core manifestation of
CD27 deficiency.
phenotype_term:
preferred_term: lymphoproliferative disorder
term:
id: HP:0005523
label: Lymphoproliferative disorder
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Phenotypes varied from asymptomatic memory B-cell deficiency (n=3) to
EBV-associated hemophagocytosis and lymphoproliferative disorder
(LPD; n=3) and malignant lymphoma (n=2; +1 after LPD).
explanation: >-
This case series explicitly documents EBV-associated lymphoproliferative
disorder in multiple CD27-deficient patients.
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Lymphoproliferation and lymphoma were the main clinical manifestations
(70% and 43%, respectively), and 9 of the CD27-deficient patients
developed HLH.
explanation: >-
The larger cohort confirms lymphoproliferation as the most frequent major
disease manifestation.
- name: Hemophagocytosis
category: Hematologic
description: >-
Some patients develop HLH-like hemophagocytic hyperinflammation during
uncontrolled EBV disease.
phenotype_term:
preferred_term: Hemophagocytosis
term:
id: HP:0012156
label: Hemophagocytosis
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Phenotypes varied from asymptomatic memory B-cell deficiency (n=3) to
EBV-associated hemophagocytosis and lymphoproliferative disorder
(LPD; n=3) and malignant lymphoma (n=2; +1 after LPD).
explanation: >-
Hemophagocytosis is explicitly reported as an EBV-associated complication
in CD27 deficiency.
- name: Lymphoma
category: Neoplastic
description: >-
CD27 deficiency markedly predisposes to EBV-driven malignant lymphoma,
including Hodgkin lymphoma.
phenotype_term:
preferred_term: Lymphoma
term:
id: HP:0002665
label: Lymphoma
evidence:
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
EBV-associated lymphoproliferative disease/hemophagocytic
lymphohistiocytosis, Hodgkin lymphoma, uveitis, and recurrent infections
were the predominant clinical features.
explanation: >-
The expanded CD27-deficiency cohort identifies Hodgkin lymphoma as a
predominant disease manifestation.
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Our data highlight the marked predisposition to lymphoma of both CD27-
and CD70-deficient patients.
explanation: >-
The largest natural-history series emphasizes lymphoma as a defining risk
of disrupted CD27/CD70 signaling.
- name: Recurrent infections
category: Immunologic
description: >-
Repeated infections occur on the background of combined immunodeficiency and
defective humoral immunity.
phenotype_term:
preferred_term: Recurrent infections
term:
id: HP:0002719
label: Recurrent infections
evidence:
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
EBV-associated lymphoproliferative disease/hemophagocytic
lymphohistiocytosis, Hodgkin lymphoma, uveitis, and recurrent infections
were the predominant clinical features.
explanation: >-
Recurrent infections are explicitly listed among the predominant clinical
features in the expanded CD27-deficiency cohort.
biochemical: []
genetic:
- name: CD27
association: CAUSATIVE
gene_term:
preferred_term: CD27
term:
id: hgnc:11922
label: CD27
notes: >-
Disease is caused by biallelic TNFRSF7/CD27 loss-of-function variants that
reduce or abolish receptor expression. TNFRSF7 is a historical alias for
CD27. Flow-cytometric immunophenotyping for absent or markedly reduced CD27
expression on lymphoid cells is a practical screening test before
confirmatory sequencing in severe EBV-associated disease.
evidence:
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
4 novel mutations were identified: homozygous missense c.G287A/p.C96Y
explanation: >-
This study expands the disease-causing TNFRSF7/CD27 variant spectrum and
confirms CD27 as the causal gene.
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
We report the simultaneous confirmation of human CD27 deficiency in 3
independent families (8 patients) due to a homozygous mutation
(p. Cys53Tyr) revealed by whole exome sequencing, leading to disruption
of an evolutionarily conserved cystein knot motif of the transmembrane
receptor.
explanation: >-
Independent families with the same homozygous missense variant confirm
CD27 deficiency as a monogenic disorder.
diagnosis:
- name: CD27 expression by flow cytometry
description: >-
Flow-cytometric immunophenotyping for absent or markedly reduced CD27 on
lymphoid cells is a rapid screening test in patients with severe or
persistent EBV-associated disease.
diagnosis_term:
preferred_term: flow cytometry procedure
term:
id: MAXO:0035055
label: flow cytometry procedure
results: >-
Absent or strongly reduced cell-surface CD27 expression supports CD27
deficiency and should prompt confirmatory TNFRSF7/CD27 sequencing.
evidence:
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Flow cytometric immunophenotyping offers a reliable initial test for CD27
deficiency.
explanation: >-
This directly supports CD27 flow cytometry as an initial diagnostic test.
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Flow cytometric immunophenotyping including expression analysis of CD27 on
lymphoid cells was followed by capillary sequencing of CD27 in index
patients, their parents, and non-affected siblings.
explanation: >-
The original multi-family series used CD27 expression analysis on lymphoid
cells before family sequencing, supporting flow cytometry as part of the
diagnostic workflow.
- name: TNFRSF7/CD27 molecular genetic testing
description: >-
Molecular testing confirms the diagnosis by identifying biallelic
pathogenic TNFRSF7/CD27 variants.
diagnosis_term:
preferred_term: molecular genetic testing
term:
id: MAXO:0000533
label: molecular genetic testing
qualifiers:
- predicate:
preferred_term: has participant
term:
id: RO:0000057
label: has participant
value:
preferred_term: CD27
term:
id: hgnc:11922
label: CD27
results: Biallelic pathogenic TNFRSF7/CD27 variants confirm the diagnosis.
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
We report the simultaneous confirmation of human CD27 deficiency in 3
independent families (8 patients) due to a homozygous mutation
(p. Cys53Tyr) revealed by whole exome sequencing, leading to disruption
of an evolutionarily conserved cystein knot motif of the transmembrane
receptor.
explanation: >-
Exome sequencing identified the causal homozygous CD27 variant in
multiple independent families.
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
4 novel mutations were identified: homozygous missense c.G287A/p.C96Y
explanation: >-
The expanded cohort confirms additional disease-causing TNFRSF7/CD27
genotypes.
- name: EBV viral-load assessment
description: >-
EBV DNA testing and EBV serology help establish the EBV-driven disease
context and provide a baseline for longitudinal monitoring.
results: >-
Detectable or persistent EBV viremia supports the characteristic
EBV-associated immune dysregulation phenotype but is not by itself
diagnostic.
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The majority of patients (90%) were EBV+ at diagnosis, but only ∼30%
presented with infectious mononucleosis.
explanation: >-
EBV positivity is common at diagnosis even without classic infectious
mononucleosis, supporting EBV testing in the diagnostic workup.
- name: Humoral immune evaluation
description: >-
Quantitative IgG, IgA, and IgM levels, vaccine antibody responses, and
memory B-cell phenotyping help identify the antibody-deficiency component.
results: >-
Hypogammaglobulinemia, impaired specific antibody responses, or reduced
memory B cells support a combined immunodeficiency phenotype.
evidence:
- reference: PMID:22197273
reference_title: "CD27 deficiency is associated with combined immunodeficiency and persistent symptomatic EBV viremia."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The index patient was hypogammaglobulinemic, and immunoglobulin
replacement therapy was initiated.
explanation: >-
The original sibling pair documents clinically relevant antibody
deficiency.
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Following EBV infection, hypogammaglobulinemia developed in at least 3 of
the affected individuals, while specific anti-viral and
anti-polysaccharide antibodies and EBV-specific T-cell responses were
detectable.
explanation: >-
Recurrent hypogammaglobulinemia after EBV infection supports quantitative
immunoglobulin and antibody-response evaluation.
- name: Lymphocyte subset and functional immunophenotyping
description: >-
Lymphocyte subset analysis should assess memory B cells, T-cell memory
compartments, EBV-specific T-cell frequencies, and CD8 T-cell effector
function where available.
diagnosis_term:
preferred_term: flow cytometry procedure
term:
id: MAXO:0035055
label: flow cytometry procedure
results: >-
Paucity of memory B/T cells, reduced EBV-specific T cells, or impaired CD8
effector function supports disrupted CD27/CD70 signaling.
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Detailed immunological characterization revealed aberrant generation of
memory B and T cells, including a paucity of EBV-specific T cells, and
impaired effector function of CD8+ T cells
explanation: >-
The largest cohort identifies the key cellular immune abnormalities to
evaluate when CD27 deficiency is suspected.
- name: HLH and lymphoma complication workup
description: >-
Patients with fever, cytopenias, organomegaly, lymphadenopathy, or systemic
inflammation require evaluation for HLH and lymphoma, including ferritin,
triglycerides, fibrinogen, soluble IL-2 receptor when available, tissue
biopsy of suspicious nodes or masses, and staging imaging guided by
hematology/oncology.
diagnosis_term:
preferred_term: clinical assessment
term:
id: MAXO:0000487
label: clinical assessment
results: >-
HLH features, EBV-associated lymphoproliferative disease, or malignant
lymphoma identify severe complications that change urgency and management.
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Lymphoproliferation and lymphoma were the main clinical manifestations
(70% and 43%, respectively), and 9 of the CD27-deficient patients
developed HLH.
explanation: >-
The high frequency of lymphoproliferation, lymphoma, and HLH supports
directed complication workup at presentation and during flares.
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
EBV-associated lymphoproliferative disease/hemophagocytic
lymphohistiocytosis, Hodgkin lymphoma, uveitis, and recurrent infections
were the predominant clinical features.
explanation: >-
This expanded cohort confirms that lymphoproliferative disease, HLH, and
Hodgkin lymphoma are predominant complications requiring active assessment.
differential_diagnoses:
- name: CD70 deficiency
description: >-
CD70 deficiency phenocopies CD27 deficiency because both disrupt the same
CD27/CD70 costimulatory axis. It is distinguished by TNFSF7/CD70 variants
and abnormal CD70 expression rather than biallelic TNFRSF7/CD27 variants.
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Biallelic mutations in the genes encoding CD27 or its ligand CD70
underlie inborn errors of immunity (IEIs) characterized predominantly by
Epstein-Barr virus (EBV)-associated immune dysregulation
explanation: >-
The shared cohort establishes CD70 deficiency as the closest mechanistic
and clinical differential diagnosis.
- name: X-linked lymphoproliferative disease
description: >-
SH2D1A- and XIAP/BIRC4-related X-linked lymphoproliferative disorders can
also present with severe EBV disease, HLH, and lymphoma, especially in male
patients, but follow X-linked inheritance and have different causal genes.
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: >-
inborn errors of immunity (IEIs) characterized predominantly by
Epstein-Barr virus (EBV)-associated immune dysregulation, such as chronic
viremia, severe infectious mononucleosis, hemophagocytic
lymphohistiocytosis (HLH), lymphoproliferation, and malignancy.
explanation: >-
The overlapping EBV-HLH-lymphoma pattern supports considering other
EBV-susceptibility inborn errors of immunity in the differential.
- name: ITK deficiency and MAGT1/XMEN disease
description: >-
ITK deficiency and MAGT1/XMEN disease are additional EBV-susceptibility
inborn errors of immunity that can overlap clinically with CD27 deficiency;
gene-panel or exome testing distinguishes them from TNFRSF7/CD27 disease.
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: >-
A comprehensive understanding of the natural history, immune
characteristics, and transplant outcomes has remained elusive.
explanation: >-
The article frames CD27/CD70 deficiency within EBV-associated inborn
errors of immunity, supporting broader gene-based differential testing.
treatments:
- name: Immunoglobulin replacement therapy
description: >-
Immunoglobulin replacement is supportive treatment for the antibody
deficiency component of CD27 deficiency.
treatment_term:
preferred_term: immunoglobulin replacement therapy
term:
id: MAXO:0001480
label: immunoglobulin infusion therapy
target_phenotypes:
- preferred_term: Hypogammaglobulinemia
term:
id: HP:0004313
label: Decreased circulating immunoglobulin concentration
evidence:
- reference: PMID:22197273
reference_title: "CD27 deficiency is associated with combined immunodeficiency and persistent symptomatic EBV viremia."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The index patient was hypogammaglobulinemic, and immunoglobulin
replacement therapy was initiated.
explanation: >-
This directly documents immunoglobulin replacement as supportive care for
CD27-deficient hypogammaglobulinemia.
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Immunoglobulin substitution therapy was administered in 5 of the newly
diagnosed cases.
explanation: >-
The expanded cohort confirms that immunoglobulin replacement is a common
supportive treatment in clinical practice.
- name: Allogeneic hematopoietic stem cell transplantation
description: >-
Allogeneic HSCT is the main potentially curative treatment for severe
CD27-related disease, especially when lymphoma, HLH, or refractory
EBV-driven immune dysregulation develops.
treatment_term:
preferred_term: allogeneic hematopoietic stem cell transplantation
term:
id: MAXO:0001479
label: allogeneic hematopoietic stem cell transplantation
target_phenotypes:
- preferred_term: Lymphoma
term:
id: HP:0002665
label: Lymphoma
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Nineteen patients underwent allogeneic hematopoietic stem cell
transplantation (HSCT) prior to adulthood predominantly because of
lymphoma, with 95% survival without disease recurrence.
explanation: >-
The multinational series shows excellent HSCT outcomes and supports early
use for severe lymphoma-predominant disease.
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Two of 8 patients died, 2 others underwent allogeneic hematopoietic stem
cell transplantation successfully, and one received anti-CD20
(rituximab) therapy repeatedly.
explanation: >-
Early case-series experience already showed successful allogeneic HSCT in
severe CD27 deficiency.
- name: Rituximab
description: >-
Anti-CD20 monoclonal antibody therapy has been used as adjunctive or bridge
treatment for severe EBV-driven CD20-positive B-cell lymphoproliferation or
lymphoma in CD27 deficiency.
treatment_term:
preferred_term: rituximab therapy
term:
id: NCIT:C15986
label: Pharmacotherapy
therapeutic_agent:
- preferred_term: rituximab
term:
id: NCIT:C1702
label: Rituximab
target_phenotypes:
- preferred_term: lymphoproliferative disorder
term:
id: HP:0005523
label: Lymphoproliferative disorder
- preferred_term: Lymphoma
term:
id: HP:0002665
label: Lymphoma
evidence:
- reference: PMID:22801960
reference_title: "Combined immunodeficiency with life-threatening EBV-associated lymphoproliferative disorder in patients lacking functional CD27."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Two of 8 patients died, 2 others underwent allogeneic hematopoietic stem
cell transplantation successfully, and one received anti-CD20
(rituximab) therapy repeatedly.
explanation: >-
The early CD27-deficiency case series documents repeated rituximab use as
adjunct treatment for severe EBV-driven disease.
- name: EBV and malignancy surveillance
description: >-
Longitudinal follow-up should monitor EBV burden, lymphadenopathy,
cytopenias, systemic inflammatory features, and symptoms concerning for
lymphoproliferative disease or lymphoma.
treatment_term:
preferred_term: supportive care
term:
id: MAXO:0000950
label: supportive care
target_phenotypes:
- preferred_term: persistent symptomatic Epstein-Barr virus viremia
term:
id: HP:0032204
label: Chronic active Epstein-Barr virus infection
- preferred_term: Lymphoma
term:
id: HP:0002665
label: Lymphoma
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The majority of patients (90%) were EBV+ at diagnosis, but only ∼30%
presented with infectious mononucleosis. Lymphoproliferation and lymphoma
were the main clinical manifestations (70% and 43%, respectively)
explanation: >-
EBV positivity and frequent lymphoproliferation/lymphoma support ongoing
viral and malignancy surveillance.
- name: HLH- and lymphoma-directed acute management
description: >-
Suspected HLH, EBV-driven lymphoproliferative disease, or lymphoma requires
urgent hematology/oncology-directed treatment using disease-standard
protocols, with infection support and consideration of HSCT once acute
disease is controlled.
treatment_term:
preferred_term: pharmacotherapy
term:
id: MAXO:0000058
label: pharmacotherapy
target_phenotypes:
- preferred_term: Hemophagocytosis
term:
id: HP:0012156
label: Hemophagocytosis
- preferred_term: Lymphoma
term:
id: HP:0002665
label: Lymphoma
evidence:
- reference: PMID:32603431
reference_title: "Extended clinical and immunological phenotype and transplant outcome in CD27 and CD70 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Lymphoproliferation and lymphoma were the main clinical manifestations
(70% and 43%, respectively), and 9 of the CD27-deficient patients
developed HLH.
explanation: >-
Frequent severe lymphoproliferative, malignant, and HLH complications
support explicit acute specialty-directed management.
- reference: PMID:25843314
reference_title: "Novel mutations in TNFRSF7/CD27: Clinical, immunologic, and genetic characterization of human CD27 deficiency."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
EBV-associated lymphoproliferative disease/hemophagocytic
lymphohistiocytosis, Hodgkin lymphoma, uveitis, and recurrent infections
were the predominant clinical features.
explanation: >-
The clinical spectrum includes the acute complications that require
disease-specific treatment rather than only immunoglobulin replacement.
- name: Vaccine planning for combined immunodeficiency
description: >-
Vaccination decisions should be individualized with immunology and
infectious-disease input. Non-live vaccines may be indicated, whereas
live-attenuated vaccines should be deferred or avoided when clinically
significant cellular or combined immunodeficiency is present.
treatment_term:
preferred_term: vaccination
term:
id: MAXO:0001017
label: vaccination
target_phenotypes:
- preferred_term: Combined immunodeficiency
term:
id: HP:0005387
label: Combined immunodeficiency
evidence:
- reference: url:https://www.cdc.gov/vaccines/hcp/imz-best-practices/altered-immunocompetence.html
reference_title: "Altered Immunocompetence | Vaccines & Immunizations | CDC"
supports: SUPPORT
evidence_source: OTHER
snippet: >-
Administration of live vaccines might need to be deferred until immune
function has improved.
explanation: >-
CDC altered-immunocompetence guidance supports live-vaccine caution in
patients with significant immune dysfunction.
- reference: url:https://www.cdc.gov/vaccines/hcp/imz-best-practices/altered-immunocompetence.html
reference_title: "Altered Immunocompetence | Vaccines & Immunizations | CDC"
supports: SUPPORT
evidence_source: OTHER
snippet: >-
Persons with most forms of altered immunocompetence should not receive
live vaccines (MMR, varicella, MMRV, LAIV, yellow fever, Ty21a oral
typhoid, BCG, smallpox, and rotavirus).
explanation: >-
This general vaccine guidance supports explicit live-attenuated vaccine
caution for CD27-related combined immunodeficiency.
datasets: []
notes: >-
MONDO currently labels MONDO:0014054 as "lymphoproliferative syndrome 2". This
entry uses the more explicit preferred term "CD27-related lymphoproliferative
and immune disorder" consistent with MONDO new term request #10132 opened on
April 7, 2026, to better reflect the combined immunodeficiency and
EBV-associated immune dysregulation phenotype.
This report is retrieval-only and is generated directly from Asta results.
search_papers_by_relevance with snippet_search.CD27-related lymphoproliferative and immune disorder is a monogenic inborn error of immunity caused by biallelic loss-of-function variants in CD27 (TNFRSF7), characterized by selective susceptibility to Epstein–Barr virus (EBV) with chronic/persistent EBV viremia and EBV-driven complications including lymphoproliferation, hemophagocytic lymphohistiocytosis (HLH), and EBV-associated lymphomas, often accompanied by hypogammaglobulinemia and defective T cell–dependent humoral immunity. (ghosh2020extendedclinicaland pages 2-3, tangye2020primaryimmunodeficienciesreveal pages 7-8, salzer2013combinedimmunodeficiencywith pages 1-2)
Not found in retrieved evidence: MONDO ID, Orphanet ID, ICD-10/ICD-11 codes, MeSH descriptor (would require direct OMIM/Orphanet/MONDO retrieval beyond the obtained full texts).
Knowledge is derived primarily from aggregated disease-level cohort studies and case series (e.g., multicenter cohorts) plus individual case reports adding phenotypic expansions. (ghosh2020extendedclinicaland pages 2-3, alkhairy2015novelmutationsin pages 4-5, golchehre2023newpresentationof pages 1-2)
Genetic cause: biallelic pathogenic variants in CD27 (TNFRSF7) causing absent or markedly reduced CD27 surface expression and functional loss of CD27–CD70 costimulation. (montfrans2012cd27deficiencyis pages 2-4, alkhairy2015novelmutationsin pages 7-9, ghosh2020extendedclinicaland pages 2-3)
Inheritance pattern: autosomal recessive; many patients reported from consanguineous families, with heterozygous relatives typically unaffected in early reports. (montfrans2012cd27deficiencyis pages 2-4, alkhairy2015novelmutationsin pages 1-2)
No protective variants or environmental protective factors were identified in the retrieved evidence. The dominant gene–environment interaction described is that EBV exposure triggers severe disease manifestations in genetically susceptible hosts (CD27 deficiency). (ghosh2020extendedclinicaland pages 2-3, salzer2013combinedimmunodeficiencywith pages 1-2)
A multicenter cohort (CD27 n=33 within a 49-patient CD27/CD70 cohort) reported: EBV-positive at diagnosis ~90%, lymphoproliferation 70%, lymphoma 43%, autoinflammatory features 43%, and HLH in 9 CD27-deficient patients. (ghosh2020extendedclinicaland pages 2-3)
A separate 17-patient CD27 cohort reported mortality 29%, and that very high EBV plasma loads were often seen (up to ~5×10^6–8×10^6 copies/mL in a table excerpt). (alkhairy2015novelmutationsin pages 5-6, alkhairy2015novelmutationsin pages 7-9)
| Feature | Description | HPO term(s) | Frequency/statistics (with cohort/source) | Notes |
|---|---|---|---|---|
| EBV susceptibility / EBV positivity | Marked susceptibility to Epstein-Barr virus with chronic/persistent viremia and EBV-driven immune dysregulation | HP:0012378 Elevated circulating Epstein-Barr virus load; HP:0002731 Recurrent viral infections | EBV-positive at diagnosis in 90% of the CD27/CD70 cohort; in Alkhairy 2015, high EBV loads were documented in 11/12 tested and plasma loads reached up to ~5×10^6–8×10^6 copies/mL (ghosh2020extendedclinicaland pages 2-3, alkhairy2015novelmutationsin pages 5-6) | Core disease-defining feature; often precedes lymphoproliferation and lymphoma |
| Lymphoproliferation | Persistent or recurrent EBV-driven lymphadenopathy/hepatosplenomegaly and benign or malignant lymphoid expansion | HP:0002716 Lymphadenopathy; HP:0001433 Hepatosplenomegaly; HP:0002841 Lymphoproliferative disorder | Lymphoproliferation reported in 70% of the multicenter cohort (49 total; 33 CD27-deficient) (ghosh2020extendedclinicaland pages 2-3) | Can mimic CVID, ALPS, chronic active EBV, or lymphoma |
| Lymphoma | Increased risk of EBV-associated lymphoma, including Hodgkin and non-Hodgkin lymphoma | HP:0002665 Lymphoma; HP:0012197 Hodgkin lymphoma; HP:0100827 Non-Hodgkin lymphoma | Lymphoma in 43% of the Ghosh 2020 cohort; cases in Alkhairy 2015 included DLBCL, extranodal EBV-related LPD, and classical Hodgkin lymphoma (ghosh2020extendedclinicaland pages 2-3, alkhairy2015novelmutationsin pages 5-6) | Malignant transformation is a major indication for HSCT |
| Hemophagocytic lymphohistiocytosis (HLH) | Hyperinflammatory episodes triggered by EBV with hemophagocytosis/HLH phenotype | HP:0003125 Hemophagocytosis; HP:0032243 Hemophagocytic lymphohistiocytosis | 9 CD27-deficient patients developed HLH in the Ghosh cohort; HLH also described in earlier cases and pooled reviews (ghosh2020extendedclinicaland pages 2-3, kishore2020novelmutationin pages 4-5) | Severe, potentially life-threatening presentation |
| Hypogammaglobulinemia / antibody deficiency | Low immunoglobulins and impaired humoral immunity, sometimes CVID-like | HP:0004313 Decreased circulating IgG level; HP:0010701 Hypogammaglobulinemia; HP:0002845 Functional abnormality of humoral immunity | Primary hypogammaglobulinemia in 3/17 in Alkhairy 2015; secondary/treatment-related hypogammaglobulinemia also common (rituximab/chemotherapy) (alkhairy2015novelmutationsin pages 4-5) | May be present at onset or emerge after EBV disease/treatment |
| Impaired vaccine / protein antigen responses | Defective T-cell–dependent antibody responses despite some preserved vaccine responses to other antigens | HP:0034335 Abnormality of immune response to vaccination | Montfrans 2012: severely impaired antibody responses to repeated protein antigens (rabies, tetanus), despite preserved responses to polysaccharide/conjugate vaccines (montfrans2012cd27deficiencyis pages 6-7) | Supports combined immunodeficiency rather than isolated antibody deficiency |
| Memory B-cell defect | Abnormal or reduced memory B-cell generation; absent/reduced CD27 expression on B cells | HP:0011839 Abnormal B-cell subset distribution; HP:0011813 Reduced memory B cell count | Ghosh 2020 reported aberrant generation of memory B and T cells; Alkhairy 2015 and related cases documented absent/reduced CD27 expression and reduced memory-cell compartments (ghosh2020extendedclinicaland pages 2-3, alkhairy2015novelmutationsin pages 7-9) | CD27 itself is a canonical memory B-cell marker, so interpretation requires genotype context |
| T-cell dysfunction / paucity of EBV-specific T cells | Impaired expansion and effector differentiation of EBV-specific CD8 T cells; reduced cytotoxic antiviral immunity | HP:0003202 Abnormal T-cell proliferation; HP:0011832 Abnormality of CD8-positive T cells | Ghosh 2020: paucity of EBV-specific T cells and impaired CD8 effector function; Montfrans 2012: reduced IL-2 production by EBV-specific CD8 T cells (ghosh2020extendedclinicaland pages 2-3, montfrans2012cd27deficiencyis pages 6-7) | Mechanistically central to failure of EBV control |
| NK / iNKT abnormalities | In some severe patients, reduced NK-cell function and/or low iNKT cells | HP:0011837 Abnormal natural killer cell count; HP:0011838 Abnormal natural killer cell function | Salzer 2013: in severely affected patients, iNKT-cell numbers and NK-cell function were reduced; Alkhairy 2015 reported reduced NK/NKT function in 5/7 measured (alkhairy2015novelmutationsin pages 7-9) | Not universal; may correlate with more severe phenotypes |
| Recurrent respiratory infections | Recurrent sinopulmonary infections, often preceding EBV-LPD recognition | HP:0002205 Recurrent respiratory infections | Frequent across reports; highlighted in case reports and pooled reviews (kishore2020novelmutationin pages 2-3, kishore2020novelmutationin pages 4-5) | Often leads initially to a CVID diagnosis |
| Bronchiectasis | Chronic airway damage from recurrent respiratory infections | HP:0002110 Bronchiectasis | Reported in the Kishore 2020 case with long-standing recurrent infections and hypogammaglobulinemia (kishore2020novelmutationin pages 2-3) | Represents chronic morbidity from delayed diagnosis |
| Hepatosplenomegaly | Enlarged liver and spleen, often with EBV-LPD | HP:0001433 Hepatosplenomegaly | Seen in Montfrans 2012 and Kishore 2020 case descriptions (montfrans2012cd27deficiencyis pages 2-4, kishore2020novelmutationin pages 2-3) | Common accompaniment of lymphoproliferation/HLH |
| Uveitis / inflammatory complications | Immune dysregulation can include ocular and systemic inflammatory disease | HP:0000554 Uveitis; HP:0002721 Immune dysregulation | EBV-associated uveitis reported in Montfrans 2012; autoinflammatory features occurred in 43% of the Ghosh cohort (montfrans2012cd27deficiencyis pages 2-4, ghosh2020extendedclinicaland pages 2-3) | Broadens phenotype beyond infection and malignancy |
| Autoinflammation | Periodic fever, arthritis, uveitis, and other inflammatory manifestations | HP:0012649 Autoinflammation; HP:0001945 Fever; HP:0001369 Arthritis | Autoinflammatory features in 21/49 overall (43%) in Ghosh 2020 (ghosh2020extendedclinicaland pages 2-3) | Important because disease may present as immune dysregulation rather than infection alone |
| Coronary ectasia / aneurysm | Unusual cardiovascular inflammatory phenotype reported in a recent child with CD27 deficiency | HP:0031364 Coronary artery aneurysm; HP:0031363 Coronary artery ectasia | Single 2023 case report of a 20-month-old boy with coronary ectasia/aneurysm plus EBV-associated lymphoma and COVID-19 (golchehre2023newpresentationof pages 1-2, golchehre2023newpresentationof pages 2-4) | Recent phenotype expansion; causality uncertain (EBV, lymphoma, inflammation, or CD27 deficiency itself) |
| Mortality | Substantial disease-related mortality without curative treatment in severe cases | HP:0003826 Reduced life expectancy | Mortality 29% in Alkhairy 2015 (approximately 5/17); two of eight died in Salzer 2013; pooled review summarized mortality as 30% (6/18) (alkhairy2015novelmutationsin pages 4-5, kishore2020novelmutationin pages 4-5) | Deaths attributed to malignancy, sepsis, aplastic anemia, hepatic failure, and severe EBV disease |
| Response to rituximab | Anti-CD20 B-cell depletion can reduce EBV load and improve EBV-LPD/HLH, sometimes transiently | HP:0031370 Abnormal response to treatment | Rituximab used in 6/17 in Alkhairy 2015; favorable but sometimes transient responses reported; Salzer 2013 reported repeated anti-CD20 therapy in one patient (alkhairy2015novelmutationsin pages 4-5, alkhairy2015novelmutationsin pages 1-2) | Useful for EBV-driven B-cell disease but not curative |
| HSCT outcome | Allogeneic HSCT is the only curative immune reconstitution approach for severe disease | HP:0012337 Abnormality of immune system physiology | Ghosh 2020: 19 patients underwent allogeneic HSCT with 95% overall survival; Alkhairy 2015: 3/17 received cord blood HSCT and were alive; Salzer 2013: 2 underwent HSCT successfully (ghosh2020extendedclinicaland pages 2-3, alkhairy2015novelmutationsin pages 4-5, alkhairy2015novelmutationsin pages 7-9) | Strong real-world evidence supporting HSCT in severe EBV-LPD/lymphoma or refractory disease |
Table: This table summarizes the major clinical features of CD27-related lymphoproliferative and immune disorder, with suggested HPO terms and quantitative observations from key cohorts and case reports. It is useful for knowledge-base curation because it links phenotype labels to disease frequency, mechanism-relevant findings, and treatment context.
A 2023 case report described a 20-month-old with CD27 deficiency and EBV-associated lymphoma plus coronary artery ectasia/aneurysm (Kawasaki-like phenotype) and SARS-CoV-2 infection, which the authors presented as an expansion beyond the canonical EBV phenotype spectrum. (golchehre2023newpresentationof pages 1-2, golchehre2023newpresentationof pages 2-4)
Multiple pathogenic variants (nonsense and missense) have been reported across cohorts, including c.24G>A (p.W8X), p.C53Y, p.C10X, p.R78W, p.C96Y, p.R107C, p.W110X, and additional novel alleles across multicenter studies. (montfrans2012cd27deficiencyis pages 2-4, alkhairy2015novelmutationsin pages 4-5, alkhairy2015novelmutationsin pages 7-9)
| Variant (cDNA/protein as reported) | Variant type | Inheritance / zygosity | Key phenotype highlights | Key treatment / outcome notes | Primary source(s) with year / journal / URL |
|---|---|---|---|---|---|
| c.24G>A, p.W8X | Nonsense / truncating | Homozygous AR in affected siblings; heterozygous carrier parents/unaffected sib | Persistent symptomatic EBV viremia; severe EBV-driven lymphadenopathy; fever; hepatosplenomegaly; EBV-associated uveitis; hypogammaglobulinemia with impaired T-cell–dependent antibody responses; one sibling died of aplastic anemia with sepsis. EBV detected in purified B cells; viral loads reported as ~3000 and 2050 copies/µg DNA in one report. Broader pooled reports associate this variant with very high EBV loads and EBV-LPD/lymphoma. (montfrans2012cd27deficiencyis pages 2-4, montfrans2012cd27deficiencyis pages 6-7, alkhairy2015novelmutationsin pages 1-2) | Immunoglobulin replacement used in surviving patient with stabilization; no HSCT/rituximab described in Montfrans excerpt. Included among variants in later pooled series/case summaries. (montfrans2012cd27deficiencyis pages 2-4, alkhairy2015novelmutationsin pages 4-5, kishore2020novelmutationin pages 4-5) | van Montfrans 2012, J Allergy Clin Immunol, https://doi.org/10.1016/j.jaci.2011.11.013; Alkhairy 2015, J Allergy Clin Immunol, https://doi.org/10.1016/j.jaci.2015.02.022 (montfrans2012cd27deficiencyis pages 2-4, alkhairy2015novelmutationsin pages 1-2) |
| c.G158A, p.C53Y | Missense | Homozygous AR in 3 independent families (8 patients total in Salzer cohort) | Phenotypic range from asymptomatic memory B-cell deficiency to EBV-associated hemophagocytosis/HLH, lymphoproliferative disorder, and malignant lymphoma; after EBV infection, hypogammaglobulinemia developed in at least 3 affected individuals; reduced iNKT cells and impaired NK function in severe cases. (salzer2013combinedimmunodeficiencywith pages 1-2, alkhairy2015novelmutationsin pages 1-2) | Two of 8 patients died; two underwent allogeneic HSCT successfully; one received repeated anti-CD20 (rituximab) therapy. (salzer2013combinedimmunodeficiencywith pages 1-2) | Salzer 2013, Haematologica, https://doi.org/10.3324/haematol.2012.068791; Alkhairy 2015, J Allergy Clin Immunol, https://doi.org/10.1016/j.jaci.2015.02.022 (salzer2013combinedimmunodeficiencywith pages 1-2, alkhairy2015novelmutationsin pages 1-2) |
| c.C30A, p.C10X | Nonsense / truncating | Reported in pooled CD27-deficient cohort; zygosity not specified in excerpt | Listed among pathogenic CD27 variants in patients with EBV viremia / EBV-related LPD / HLH / lymphoma and hypogammaglobulinemia spectrum. (kishore2020novelmutationin pages 4-5, alkhairy2015novelmutationsin pages 4-5) | Included in cohorts where rituximab often produced favorable but sometimes transient responses and HSCT was curative in selected severe cases; variant-specific outcome not isolated in excerpt. (alkhairy2015novelmutationsin pages 4-5, kishore2020novelmutationin pages 4-5) | Alkhairy 2015, J Allergy Clin Immunol, https://doi.org/10.1016/j.jaci.2015.02.022; Kishore 2020, BMJ Case Rep, https://doi.org/10.1136/bcr-2019-233482 (alkhairy2015novelmutationsin pages 4-5, kishore2020novelmutationin pages 4-5) |
| c.C232T, p.R78W | Missense | Reported in pooled cohort; zygosity not specified in excerpt | In silico prediction damaging; associated within pooled CD27-deficiency series with EBV viremia/LPD, lymphoma, HLH, and antibody deficiency spectrum. (alkhairy2015novelmutationsin pages 5-6, kishore2020novelmutationin pages 4-5) | Variant-specific treatment not isolated; pooled cohort treatments included IVIG, rituximab, chemotherapy, and HSCT. (alkhairy2015novelmutationsin pages 5-6, kishore2020novelmutationin pages 4-5) | Alkhairy 2015, J Allergy Clin Immunol, https://doi.org/10.1016/j.jaci.2015.02.022; Kishore 2020, BMJ Case Rep, https://doi.org/10.1136/bcr-2019-233482 (alkhairy2015novelmutationsin pages 5-6, kishore2020novelmutationin pages 4-5) |
| c.G287A, p.C96Y | Missense | Reported in pooled cohort; zygosity not specified in excerpt | In silico prediction damaging; reported among pathogenic variants in CD27 deficiency with EBV-related disease, including chronic/persistent EBV viremia, LPD, lymphoma, and hypogammaglobulinemia. (alkhairy2015novelmutationsin pages 5-6, kishore2020novelmutationin pages 4-5) | Variant-specific treatment not isolated; pooled treatment experience includes IVIG, rituximab, conventional chemotherapy, and HSCT. (alkhairy2015novelmutationsin pages 4-5, kishore2020novelmutationin pages 4-5) | Alkhairy 2015, J Allergy Clin Immunol, https://doi.org/10.1016/j.jaci.2015.02.022; Kishore 2020, BMJ Case Rep, https://doi.org/10.1136/bcr-2019-233482 (alkhairy2015novelmutationsin pages 5-6, kishore2020novelmutationin pages 4-5) |
| c.C319T, p.R107C | Missense | Reported in pooled cohort; one report notes structural misfolding prediction; zygosity not specified in excerpt | Associated with EBV viremia / EBV-related extranodal LPD / Hodgkin or diffuse large B-cell lymphoma / HLH spectrum in pooled cases; impaired CD27 expression and high EBV loads reported across affected cohort. (alkhairy2015novelmutationsin pages 5-6, kishore2020novelmutationin pages 4-5) | Variant-specific response not isolated; pooled cohort notes rituximab can be favorable but transient, chemotherapy responses variable, and HSCT successful in selected cases. (alkhairy2015novelmutationsin pages 4-5, alkhairy2015novelmutationsin pages 7-9) | Alkhairy 2015, J Allergy Clin Immunol, https://doi.org/10.1016/j.jaci.2015.02.022; Kishore 2020, BMJ Case Rep, https://doi.org/10.1136/bcr-2019-233482 (alkhairy2015novelmutationsin pages 5-6, kishore2020novelmutationin pages 4-5) |
| c.G329A, p.W110X | Nonsense / truncating | Reported in pooled case summary; zygosity not specified in excerpt | Listed among CD27 pathogenic variants in patients with recurrent infections, hypogammaglobulinemia/CVID-like disease, persistent lymphadenopathy/hepatosplenomegaly, high EBV titers, EBV-driven LPD, HLH, and lymphoma. (kishore2020novelmutationin pages 4-5, izawa2017inheritedcd70deficiency pages 10-11) | Variant-specific treatment not isolated; broader cohort experience supports rituximab for EBV-driven B-cell disease and HSCT as definitive therapy in severe disease. (kishore2020novelmutationin pages 4-5, tangye2020primaryimmunodeficienciesreveal pages 7-8) | Kishore 2020, BMJ Case Rep, https://doi.org/10.1136/bcr-2019-233482; Izawa 2017 mechanistic comparison, J Exp Med, https://doi.org/10.1084/jem.20160784 (kishore2020novelmutationin pages 4-5, izawa2017inheritedcd70deficiency pages 10-11) |
| Homozygous CD27 variant (not specified in excerpt) | Not specified in excerpt | Homozygous AR | 20-month-old boy with CD27 deficiency; EBV-associated lymphoma (EBER-positive), dysgammaglobulinemia / impaired antibody responses in disease background, coronary artery ectasia / aneurysm, and later SARS-CoV-2 infection; authors note >35 CD27-deficient patients reported. (golchehre2023newpresentationof pages 1-2, golchehre2023newpresentationof pages 2-4) | Treated with IVIG and aspirin for Kawasaki-like/coronary presentation; lymphoma treated with ABVD and COPP; coronary aneurysm size decreased with aspirin/Plavix; short-term survival reported. (golchehre2023newpresentationof pages 2-4) | Golchehre 2023, Iran J Allergy Asthma Immunol, https://doi.org/10.18502/ijaai.v22i1.12013 (golchehre2023newpresentationof pages 1-2, golchehre2023newpresentationof pages 2-4) |
| Multiple biallelic CD27 variants (16 distinct mutations across cohort) | Mixed: nonsense, missense, other LOF | Predominantly homozygous / biallelic AR; some compound heterozygous | In the largest multicenter cohort of CD27/CD70 defects, 90% were EBV-positive at diagnosis; lymphoproliferation 70%; lymphoma 43%; 9 CD27-deficient patients developed HLH; autoinflammatory features in 43%; aberrant memory B/T-cell generation and paucity of EBV-specific T cells. (ghosh2020extendedclinicaland pages 2-3) | 19 patients underwent allogeneic HSCT with 95% overall survival and no disease recurrence reported; timely HSCT advocated, especially for malignant transformation. (ghosh2020extendedclinicaland pages 2-3, ghosh2020extendedclinicaland pages 3-4) | Ghosh 2020, Blood (cohort summarized in retrieved evidence), DOI noted in excerpt as 10.1182/blood.2020006738 (ghosh2020extendedclinicaland pages 2-3, ghosh2020extendedclinicaland pages 3-4) |
| Mixed CD27 cohort variants including c.24G>A/p.W8X, c.G158A/p.C53Y, c.C30A/p.C10X, c.C232T/p.R78W, c.G287A/p.C96Y, c.C319T/p.R107C | Mixed | Mixed biallelic AR; many from consanguineous families | 17-patient cohort: EBV disease prominent; high EBV plasma loads in 11/12 tested, up to ~5×10^6–8×10^6 copies/mL; DLBCL, extranodal EBV-related LPD, classical Hodgkin lymphoma, HLH, and hypogammaglobulinemia/secondary HGG all reported; mortality 29%. (alkhairy2015novelmutationsin pages 5-6, alkhairy2015novelmutationsin pages 7-9, alkhairy2015novelmutationsin pages 4-5) | Rituximab used in 6/17 with favorable sometimes transient response; conventional chemotherapy responses variable; 3/17 underwent cord blood HSCT and were alive. (alkhairy2015novelmutationsin pages 4-5, alkhairy2015novelmutationsin pages 7-9) | Alkhairy 2015, J Allergy Clin Immunol, https://doi.org/10.1016/j.jaci.2015.02.022 (alkhairy2015novelmutationsin pages 4-5, alkhairy2015novelmutationsin pages 5-6, alkhairy2015novelmutationsin pages 7-9) |
Table: This table compiles reported pathogenic CD27 (TNFRSF7) variants from the retrieved evidence and links each variant to the clinical phenotype spectrum, EBV-related manifestations, and available treatment/outcome data. It is useful for quickly mapping genotype to phenotype and identifying where variant-specific versus cohort-level evidence is currently available.
The consistent mechanistic interpretation is loss of CD27 function (reduced/absent CD27 expression and/or impaired CD70 binding/costimulation), leading to defective EBV-specific T-cell expansion and impaired post-germinal-center B-cell responses. (montfrans2012cd27deficiencyis pages 8-10, tangye2020primaryimmunodeficienciesreveal pages 7-8, izawa2017inheritedcd70deficiency pages 1-2)
No specific modifier genes, epigenetic signatures, or recurrent chromosomal abnormalities were identified in the retrieved evidence.
The key environmental/infectious factor is EBV as a trigger for disease expression and progression to LPD/HLH/lymphoma. (ghosh2020extendedclinicaland pages 2-3, salzer2013combinedimmunodeficiencywith pages 1-2)
A 2023 report noted concomitant SARS-CoV-2 infection in an infant with CD27 deficiency, but causal contribution to the phenotype remains uncertain. (golchehre2023newpresentationof pages 1-2)
CD27 is a TNFR superfamily costimulatory receptor expressed on multiple immune subsets, and its ligand CD70 is induced on activated and EBV-infected B cells. CD27–CD70 engagement provides costimulation that enhances T-cell activation, survival, proliferation, and differentiation, which is required for effective anti-EBV immunity. (tangye2020primaryimmunodeficienciesreveal pages 7-8, izawa2017inheritedcd70deficiency pages 1-2, ghosh2020extendedclinicaland pages 2-3)
Direct abstract-supported statement (example): Salzer et al. reported: “CD27… interacts with CD70 and influences T-, B- and NK-cell functions. Disturbance of this axis impairs immunity and memory generation against viruses including Epstein Barr virus (EBV).” (salzer2013combinedimmunodeficiencywith pages 1-2)
(These GO mappings are consistent with costimulatory receptor biology described in primary texts but were not enumerated as GO terms in the retrieved papers.)
Primary systems/organs: - Lymphoid system: lymph nodes (lymphadenopathy/LPD), spleen and liver (hepatosplenomegaly). Suggested UBERON: lymph node (UBERON:0000029), spleen (UBERON:0002106), liver (UBERON:0002107). (montfrans2012cd27deficiencyis pages 2-4, ghosh2020extendedclinicaland pages 2-3) - Respiratory system: recurrent airway infections and bronchiectasis. Suggested UBERON: lung (UBERON:0002048), bronchus (UBERON:0002185). (kishore2020novelmutationin pages 2-3) - Eye: uveitis in EBV context. Suggested UBERON: uvea (UBERON:0001769). (montfrans2012cd27deficiencyis pages 2-4) - Cardiovascular system (recent report): coronary artery ectasia/aneurysm. Suggested UBERON: coronary artery (UBERON:0001621). (golchehre2023newpresentationof pages 2-4)
Onset: typically childhood (mean age of disease manifestation ~7.3 years in one multicenter cohort). (ghosh2020extendedclinicaland pages 3-4)
Course: variable; patients may be asymptomatic early, or develop progressive EBV viremia leading to LPD/HLH/lymphoma; autoinflammatory features may occur. (ghosh2020extendedclinicaland pages 2-3, salzer2013combinedimmunodeficiencywith pages 1-2)
No robust population-level prevalence/incidence estimates were identified in the retrieved evidence. The disease is described via rare-case aggregation, with authors noting “more than 35 patients” reported as of 2023. (golchehre2023newpresentationof pages 1-2)
Carrier frequencies and founder effects were not extractable from the obtained texts (gnomAD and population-genetic databases were not queried by tools in this run).
Approaches used in reported studies include: - Targeted Sanger sequencing of CD27 and related differential genes (e.g., SH2D1A, XIAP, PRF1 in one report). (montfrans2012cd27deficiencyis pages 2-4) - Whole-exome sequencing with confirmatory Sanger sequencing and family segregation. (salzer2013combinedimmunodeficiencywith pages 1-2, alkhairy2015novelmutationsin pages 1-2)
MAXO term suggestions (not exhaustive): hematopoietic stem cell transplantation; immunoglobulin replacement therapy; anti-CD20 monoclonal antibody therapy; antimicrobial prophylaxis; chemotherapy; HLH treatment protocol.
Clinical trials: No CD27-deficiency–specific interventional trials were identified via the clinical trials tool in this run.
No disease-specific primary prevention strategies exist beyond genetic counseling and early diagnosis; however, practical risk reduction includes: - Early identification and monitoring for EBV DNAemia and lymphoproliferation. (montfrans2012cd27deficiencyis pages 2-4, ghosh2020extendedclinicaland pages 2-3) - Family testing/cascade screening in autosomal recessive pedigrees once a familial variant is known. (montfrans2012cd27deficiencyis pages 2-4)
No naturally occurring veterinary CD27-deficiency disease analogs were identified in the retrieved evidence.
Mouse studies cited in human CD27-deficiency literature indicate that Cd27−/− impacts antiviral T-cell biology (e.g., impaired primary/memory CD4/CD8 responses and reduced IL-2–producing CD8 memory cells), supporting biological plausibility for human EBV susceptibility. (montfrans2012cd27deficiencyis pages 7-8, salzer2013combinedimmunodeficiencywith pages 1-2)
References
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(alkhairy2015novelmutationsin pages 5-6): Omar K. Alkhairy, Ruy Perez-Becker, Gertjan J. Driessen, Hassan Abolhassani, Joris van Montfrans, Stephan Borte, Sharon Choo, Ning Wang, Kiki Tesselaar, Mingyan Fang, Kirsten Bienemann, Kaan Boztug, Ana Daneva, Francoise Mechinaud, Thomas Wiesel, Christian Becker, Gregor Dückers, Kathrin Siepermann, Menno C. van Zelm, Nima Rezaei, Mirjam van der Burg, Asghar Aghamohammadi, Markus G. Seidel, Tim Niehues, and Lennart Hammarström. Novel mutations in tnfrsf7/cd27: clinical, immunologic, and genetic characterization of human cd27 deficiency. The Journal of allergy and clinical immunology, 136 3:703-712.e10, Sep 2015. URL: https://doi.org/10.1016/j.jaci.2015.02.022, doi:10.1016/j.jaci.2015.02.022. This article has 160 citations.
(kishore2020novelmutationin pages 4-5): Rashmi Kishore, Aditya Gupta, Aditya Kumar Gupta, and Sushil Kumar Kabra. Novel mutation in the cd27 gene in a patient presenting with hypogammaglobulinemia, bronchiectasis and ebv-driven lymphoproliferative disease. BMJ Case Reports, 13:e233482, Feb 2020. URL: https://doi.org/10.1136/bcr-2019-233482, doi:10.1136/bcr-2019-233482. This article has 8 citations and is from a peer-reviewed journal.
(montfrans2012cd27deficiencyis pages 6-7): Joris M. van Montfrans, Andy I.M. Hoepelman, Sigrid Otto, Marielle van Gijn, Lisette van de Corput, Roel A. de Weger, Linda Monaco-Shawver, Pinaki P. Banerjee, Elisabeth A.M. Sanders, Cornelia M. Jol–van der Zijde, Michael R. Betts, Jordan S. Orange, Andries C. Bloem, and Kiki Tesselaar. Cd27 deficiency is associated with combined immunodeficiency and persistent symptomatic ebv viremia. The Journal of allergy and clinical immunology, 129 3:787-793.e6, Mar 2012. URL: https://doi.org/10.1016/j.jaci.2011.11.013, doi:10.1016/j.jaci.2011.11.013. This article has 259 citations.
(golchehre2023newpresentationof pages 2-4): Zahra Golchehre, Samin Sharafian, Nader Momtazmanesh, Zahra Chavoshzadeh, Abdollah Karimi, Hassan Abolhassani, Maryam Kazemi Aghdam, Koroush Vahidshahi, Seyedehatefeh Hashemimoghaddam, Farid Kosari, Zahra Khafafpour, Bibi Shahin Shamsian, and Mohammad Keramatipour. New presentation of cd27 deficiency; coronary ectasia and covid-19. Iranian Journal of Allergy, Asthma and Immunology, Feb 2023. URL: https://doi.org/10.18502/ijaai.v22i1.12013, doi:10.18502/ijaai.v22i1.12013. This article has 7 citations.
(izawa2017inheritedcd70deficiency pages 10-11): Kazushi Izawa, Emmanuel Martin, Claire Soudais, Julie Bruneau, David Boutboul, Rémy Rodriguez, Christelle Lenoir, Andrew D. Hislop, Caroline Besson, Fabien Touzot, Capucine Picard, Isabelle Callebaut, Jean-Pierre de Villartay, Despina Moshous, Alain Fischer, and Sylvain Latour. Inherited cd70 deficiency in humans reveals a critical role for the cd70–cd27 pathway in immunity to epstein-barr virus infection. The Journal of Experimental Medicine, 214:73-89, Jan 2017. URL: https://doi.org/10.1084/jem.20160784, doi:10.1084/jem.20160784. This article has 181 citations.
(ghosh2020extendedclinicaland pages 3-4): S Ghosh, SK Bal, and ES Edwards. Extended clinical and immunological phenot pe and transplant outcome in cd27 and cd70 deficienc.,(23), 2638-2655. doi: 10.1182/blood. 2020006738 …. Unknown journal, 2020.
(montfrans2012cd27deficiencyis pages 8-10): Joris M. van Montfrans, Andy I.M. Hoepelman, Sigrid Otto, Marielle van Gijn, Lisette van de Corput, Roel A. de Weger, Linda Monaco-Shawver, Pinaki P. Banerjee, Elisabeth A.M. Sanders, Cornelia M. Jol–van der Zijde, Michael R. Betts, Jordan S. Orange, Andries C. Bloem, and Kiki Tesselaar. Cd27 deficiency is associated with combined immunodeficiency and persistent symptomatic ebv viremia. The Journal of allergy and clinical immunology, 129 3:787-793.e6, Mar 2012. URL: https://doi.org/10.1016/j.jaci.2011.11.013, doi:10.1016/j.jaci.2011.11.013. This article has 259 citations.
(izawa2017inheritedcd70deficiency pages 1-2): Kazushi Izawa, Emmanuel Martin, Claire Soudais, Julie Bruneau, David Boutboul, Rémy Rodriguez, Christelle Lenoir, Andrew D. Hislop, Caroline Besson, Fabien Touzot, Capucine Picard, Isabelle Callebaut, Jean-Pierre de Villartay, Despina Moshous, Alain Fischer, and Sylvain Latour. Inherited cd70 deficiency in humans reveals a critical role for the cd70–cd27 pathway in immunity to epstein-barr virus infection. The Journal of Experimental Medicine, 214:73-89, Jan 2017. URL: https://doi.org/10.1084/jem.20160784, doi:10.1084/jem.20160784. This article has 181 citations.
(kishore2020novelmutationin pages 1-2): Rashmi Kishore, Aditya Gupta, Aditya Kumar Gupta, and Sushil Kumar Kabra. Novel mutation in the cd27 gene in a patient presenting with hypogammaglobulinemia, bronchiectasis and ebv-driven lymphoproliferative disease. BMJ Case Reports, 13:e233482, Feb 2020. URL: https://doi.org/10.1136/bcr-2019-233482, doi:10.1136/bcr-2019-233482. This article has 8 citations and is from a peer-reviewed journal.
(ghosh2020extendedclinicaland pages 8-8): S Ghosh, SK Bal, and ES Edwards. Extended clinical and immunological phenot pe and transplant outcome in cd27 and cd70 deficienc.,(23), 2638-2655. doi: 10.1182/blood. 2020006738 …. Unknown journal, 2020.
(montfrans2012cd27deficiencyis pages 7-8): Joris M. van Montfrans, Andy I.M. Hoepelman, Sigrid Otto, Marielle van Gijn, Lisette van de Corput, Roel A. de Weger, Linda Monaco-Shawver, Pinaki P. Banerjee, Elisabeth A.M. Sanders, Cornelia M. Jol–van der Zijde, Michael R. Betts, Jordan S. Orange, Andries C. Bloem, and Kiki Tesselaar. Cd27 deficiency is associated with combined immunodeficiency and persistent symptomatic ebv viremia. The Journal of allergy and clinical immunology, 129 3:787-793.e6, Mar 2012. URL: https://doi.org/10.1016/j.jaci.2011.11.013, doi:10.1016/j.jaci.2011.11.013. This article has 259 citations.