nevus of Ito
Findings
No curated finding names nevus of Ito yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Nevus of Ito is a benign dermal melanocytosis occurring most frequently in the Asian populations and characterized by unilateral, asymptomatic, blue, gray or brown skin pigmentation within the acromioclavicular and upper chest area (involving the side of the neck, the supraclavicular and scapular areas, and the shoulder region). It is usually diagnosed in early infancy and in early adolescence. Nevus of Ito may progressively enlarge and darken in color (particularly with puberty) and its appearance usually remains stable once adulthood is reached. Spontaneous regression does not occur. Malignant melanoma has rarely been reported within a nevus of Ito. It shares the clinical features of nevus of Ota, except its anatomic location and may in rare occasions occur together with the latter.
Definition from the Mondo Disease Ontology (MONDO:0016985), read 2026-09-29. CC BY 4.0.
Features
2 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- NevusHPOHP:0003764
- Very frequent (80% to 99% of cases)
- Cutaneous melanomaHPOHP:0012056
- Very rare (1% to 4% of cases)
Reported absent (1)
- Ocular melanocytosisHPOHP:0025534
Where it sits
- A kind of
Other names
3 names
Resolves to: nevus of Ito
- Also called
- Ito's Nevusnevi of Itonevus fuscocaeruleus acromiodeltoideus