Rare diseases · Sign or symptom
Nevus
Mole
HP:0003764
What it means
A nevus is a type of hamartoma that is a circumscribed stable malformation of the skin.
The word Nevus derives from the Latin word Knee-vus meaning birthmark or mole.
In everyday care
Most people with this sign do not have a rare disease — it appears in common conditions far more often. These general reference pages cover the same topic:
Rare diseases that can present with this18
Very common80–99%
6Sometimes5–29%
10- Autosomal recessive generalized dystrophic epidermolysis bullosa, intermediate form
- Autosomal recessive generalized epidermolysis bullosa simplex
- Autosomal recessive multiple pterygium syndrome
- EEC syndrome
- Hemihyperplasia-multiple lipomatosis syndrome
- Monosomy X syndrome
- Mosaic monosomy X syndrome
- Takenouchi-Kosaki syndrome
and 2 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: Naevi · Naevus · Nevi
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
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.