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Living with Nevus of Ito

A slate-brown or blue-gray birthmark, usually on the shoulder and upper arm, caused by pigment cells sitting deeper in the skin.

Understanding Nevus of Ito

Nevus of Ito is a slate-brown or blue-gray birthmark in which pigment cells (melanocytes) sit deeper than normal in the skin.

The birthmark is usually on the shoulder and upper arm on one side of the body. It can sometimes come with changes in sensation in that patch of skin. It is most common in Asian populations and appears more often in females. It is very uncommon in Caucasians. Very rarely it becomes cancerous.

Signs & symptoms

Symptoms vary from person to person. GARD lists this as the most common:

  • A colored birthmark (nevus)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include cancer specialists and skin, hair, and nail specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Cancer specialists (oncologists); Skin, hair, and nail specialists (dermatologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Children's Skin Disease Foundation
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Does this birthmark need to be monitored over time?
What changes in the birthmark should I report right away?
Is the eye area worth checking for pigment changes too?

Quick facts

Symptoms usually startany time in life

GARD says the exact cause is unknown.

Skin

Also known as: ito's nevus; nevi of ito; nevus fuscocaeruleus acromiodeltoideus

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Nevus of ItoGARD ID 10830 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Nevus of Ito.

Explore the Nevus of Ito blog

Explore research for Nevus of Ito

Explore actively recruiting Nevus of Ito studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Nevus of Ito with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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