Rare diseases · Sign or symptom
Abnormal hair pattern
Abnormal distribution of hair
HP:0010720
What it means
An abnormality of the distribution of hair growth.
Rare diseases that can present with this28
Very common80–99%
13- 8q22.1microdeletion syndrome
- Craniodigital-intellectual disability syndrome
- Difference of sex development-intellectual disability syndrome
- Distal duplication 18q syndrome
- Focal facial dermal dysplasia type III
- Johanson-Blizzard syndrome
- Oculotrichoanal syndrome
- Prominent glabella-microcephaly-hypogenitalism syndrome
- Ring chromosome 1 syndrome
- Ringed hair disease
- Trisomy 4p syndrome
- X-linked intellectual disability, Cabezas type
- XY type gonadal dysgenesis-associated anomalies syndrome
Common30–79%
6Sometimes5–29%
8The 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
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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.