Rare diseases · Sign or symptom
Short distal phalanx of hallux
Small outermost bone of big toe
HP:0010103
What it means
Underdevelopment (hypoplasia) of the distal 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: Hypoplastic/small distal phalanx of the hallux · Small distal phalanx of big toe · Small distal phalanx of hallux
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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.