Rare diseases · Sign or symptom
Duplication of phalanx of 3rd finger
Duplication of middle finger bone
HP:0009959
What it means
This term applies if one or more of the phalanges of the 3rd finger are either partially duplicated, depending on severity leading to a broad or bifid appearance of the phalanges, or completely duplicated.
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: Partial/complete duplication of phalanges of the 3rd 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.