Rare diseases · Sign or symptom
Partial duplication of the distal phalanx of the 2nd finger
Notched outermost bone of the index finger
HP:0009951
What it means
Partial duplication of the distal phalanx of index finger, seen on x-rays as a broad and/or bifid phalanx.
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: Bifid terminal phalanx of the 2nd finger · Partial duplication of the outermost bone of the 2nd 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.