Please provide a comprehensive research report on FGFR2-related human diseases, with a primary focus on genotype-phenotype correlations and on why different FGFR2 alterations produce different syndromes or cancer subtypes.
This is a grouped research task across multiple related diseases, not a single-disorder report.
Core questions
- What Mendelian diseases are definitively caused by germline FGFR2 variants?
- What cancer types are recurrently driven by somatic FGFR2 alterations, and which alteration classes matter most (fusion, missense, amplification, splice, rearrangement, etc.)?
- For the FGFR2 craniosynostosis / skeletal syndromes, how do the following differ:
- Apert syndrome
- Crouzon syndrome
- Jackson-Weiss syndrome
- Pfeiffer syndrome
- Beare-Stevenson cutis gyrata syndrome
- bent bone dysplasia syndrome 1
- LADD syndrome / LADD syndrome 1
- acinar dysplasia caused by FGFR2 mutation
- For those disorders, how do differences in phenotype relate to:
- variant position and protein domain
- exon and splice-form context, especially IIIb vs IIIc where relevant
- altered ligand-binding specificity vs constitutive activation
- tissue and developmental context
- known modifier/background effects
- Which specific variants or codons are syndrome-enriched, and which are shared across multiple FGFR2 syndromes?
- Which findings are firmly established, and which remain unresolved or debated?
Output requirements
- Separate Mendelian disorders from cancers.
- Include a table with columns: disease | MONDO/OMIM if available | germline vs somatic | alteration class | recurrent variants/fusions | core mechanism | key distinguishing phenotype | strength of evidence
- Include a second table specifically for the FGFR2 craniosynostosis / skeletal spectrum with columns: variant/codon | domain/exon | isoform relevance | syndrome(s) reported | evidence for syndrome specificity vs shared allelic spectrum
- Clearly distinguish established fact from inference.
- Prefer primary sources and authoritative curation resources such as ClinGen, GeneReviews, OMIM, MONDO, MedGen, and key original papers.
- Highlight contradictions, gaps, and open mechanistic questions.
- Emphasize details useful for curation into a disease mechanism knowledge base.