Rare diseases · Sign or symptom
Fifth finger symphalangism
Fused little finger bones
HP:0004218
What it means
Congenital bony fusion of two adjacent phalanges of the fifth finger.
Rare diseases that can present with this2
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: Fused pinkie finger bones · Fused pinky finger bones · Symphalagism of the little finger
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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.