Rare diseases · Sign or symptom
Hypertrichosis
HP:0000998
What it means
Hypertrichosis is increased hair growth that is abnormal in quantity or location.
Rare diseases that can present with this34
Very common80–99%
5Common30–79%
12- Adrenocortical carcinoma
- Bohring-Opitz syndrome
- Combined immunodeficiency with facio-oculo-skeletal anomalies
- Congenital generalized lipodystrophy
- Dermatosparaxis Ehlers-Danlos syndrome
- Dysplastic cortical hyperostosis, Al-Gazali type
- H syndrome
- Intellectual disability-cardiac anomalies-short stature-joint laxity syndrome
- Leigh syndrome
- POEMS syndrome
- Rabson-Mendenhall syndrome
- Stiff skin syndrome
Sometimes5–29%
16- Acromegaly
- ALG9-CDG
- CTCF-related neurodevelopmental disorder
- DPAGT1-CDG
- Kabuki syndrome
- Kaposiform hemangioendothelioma
- Large/giant congenital melanocytic nevus
- MELAS
and 8 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: Excessive hair growth · Increased hair growth on body
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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.