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Sillence syndrome (brachydactyly-symphalangism syndrome) resembles type A1 brachydactyly (variable shortening of the middle phalanges of all digits) with associated symphalangism (producing a distal phalanx with the shape of a chess pawn). Scoliosis, clubfoot and tall stature are also characteristic.
Features include very common findings: Brachydactyly and Pes cavus; and common findings: Metatarsus adductus, Sideways curvature of the spine (scoliosis), Flat acetabular roof, and Short middle phalanx of finger and others. 26 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Arms and legs | 6 | Short finger, Abnormal distal phalanx morphology of finger, Abnormal proximal phalanx morphology of the hand |
Phenotype severity distribution: 2 very common features, 5 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for Sillence syndrome.
4 publications have been identified in PubMed for Sillence syndrome. Kisho has analyzed 2 by research type. Research spans Review / Meta-Analysis (50%) and Case Report / Case Series (50%).
de Freitas Netto F (2025). [PMID: 41450726](https://pubmed.ncbi.nlm.nih.gov/41450726/). *Mol Syndromol*. [Case Report / Case Series]
Sillence DO (2024). [PMID: 38942908](https://pubmed.ncbi.nlm.nih.gov/38942908/). *Calcif Tissue Int*. [Review / Meta-Analysis]
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 12:56 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about Sillence syndrome
Bones and joints | 3 | Sideways curvature of the spine (scoliosis), Abnormal vertebral morphology, Large tarsal bones |
Head and neck | 1 | Oval face |
Skin | 1 | Abnormal nail morphology |