Rare diseases · Sign or symptom

Complete duplication of hallux phalanx

Complete duplication of big toe bones

HP:0010100

What it means

Complete duplication of one or more phalanx of big toe.

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: Complete duplication of the phalanges of the hallux

Complete duplication of hallux phalanx

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This 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.