Rare diseases · Sign or symptom
Synostosis of thumb phalanx
Fusion of thumb bone
HP:0009635
What it means
Fusion of a phalanx of the thumb with another bone.
Part of the broader category
Synostosis of thumb phalanx
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.