Rare diseases · Sign or symptom
Distal finger symphalangism
Fused outermost bones of hand
HP:0001204
What it means
The term distal symphalangism refers to a bony fusion of the distal and middle phalanges of the digits of the hand, in other words the distal interphalangeal joint (DIJ) is missing which can be seen either on x-rays or as an absence of the distal interphalangeal finger creases.
Rare diseases that can present with this1
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Distal symphalangism of hands · Symphalangism affecting the distal phalanges of the hand · Synostosis of distal phalanges · Terminal symphalangism
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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.