Rare diseases · Sign or symptom
Broad hallux phalanx
Broad bone of big toe
HP:0010059
What it means
An increase in width in one or more phalanges of the big toe.
Rare diseases that can present with this26
Very common80–99%
7Common30–79%
11- 2q31.1microdeletion syndrome
- Acro-renal-ocular syndrome
- Autosomal recessive Robinow syndrome
- Cantú syndrome
- Craniofrontonasal dysplasia
- CTCF-related neurodevelopmental disorder
- Hypertelorism-hypospadias-polysyndactyly syndrome
- Jacobsen syndrome
- Multiple sulfatase deficiency
- PHAVER syndrome
- Ulna hypoplasia-intellectual disability syndrome
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: Broad phalanges of the hallux · Wide bone of big toe
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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.