Rare diseases · Sign or symptom
Broad hallux
Broad big toe
HP:0010055
What it means
Visible increase in width of the hallux without an increase in the dorso-ventral dimension.
Note that girth may be increased in a broad hallux, but this must be distinguished from Macrodactyly because there the length is also increased. This assessment may be difficult when the hallux is short.
Rare diseases that can present with this25
Very common80–99%
4Common30–79%
9- 2q23.1microduplication syndrome
- MEND syndrome
- Microcephaly-brachydactyly-kyphoscoliosis syndrome
- Mowat-Wilson syndrome
- Nephrosis-deafness-urinary tract-digital malformations syndrome
- Ogden syndrome
- Orofaciodigital syndrome type 14
- Orofaciodigital syndrome type 2
- Rubinstein-Taybi syndrome due to 16p13.3 microdeletion
Sometimes5–29%
11- Ankyloblepharon-ectodermal defects-cleft lip/palate syndrome
- Distal deletion 12q syndrome
- Houge-Janssens syndrome type 2
- Intellectual disability-cardiac anomalies-short stature-joint laxity syndrome
- Limb body wall complex
- Mowat-Wilson syndrome due to a ZEB2 point mutation
- Mowat-Wilson syndrome due to monosomy 2q22
- Proximal 3p25.3 microdeletion syndrome
and 3 more in this range
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: Abnormally broad great toes · Broad great toe · Broad great toes · Broad halluces · Wide 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.