Skip to content
knowrare
HealthSignal
Your condition community

Living with Tumor predisposition syndrome 3

An inherited condition with a higher chance of developing several kinds of tumors, including melanoma, usually in adulthood.

Understanding Tumor predisposition syndrome 3

Tumor predisposition syndrome 3 (susceptibility to cutaneous malignant melanoma 10, CMM10) is a genetic condition with an increased risk of benign and cancerous tumors.

This includes melanoma, a type of skin cancer. Tumors can affect the skin, connective tissue, nerves, and blood. The risk goes up with age. Tumors usually appear in adulthood but can sometimes develop in childhood. Not everyone who inherits the gene change will develop symptoms.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet.

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

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

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

  4. Connect with expert centers

    Melanoma Research Foundation and The Skin Cancer Foundation may keep lists of experts for this condition.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
Expert care
Expert lists: Melanoma Research Foundation, The Skin Cancer Foundation
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 Melanoma Research Alliance and other patient organizations
  • 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
Can genetic testing of the POT1 gene confirm this diagnosis?
What screening should I have for skin and other tumors?
Should my family members be tested?

Quick facts

InheritanceAutosomal Dominant

This condition is caused by changes in the POT1 gene. It is autosomal dominant, which means one changed copy of the gene can be enough to cause it.

Also known as: cmm10; glioma susceptibility 9; glioma susceptibility type 9; glm9; long telomere syndrome, pot1-related; malignant glioma caused by mutation in pot1

Patient organizations

Source: NIH GARD · Tumor predisposition syndrome 3GARD ID 18582 · 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 Tumor predisposition syndrome 3.

Explore the Tumor predisposition syndrome 3 blog

Explore research for Tumor predisposition syndrome 3

Explore actively recruiting Tumor predisposition syndrome 3 studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Tumor predisposition syndrome 3 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

Powered by HealthSpark, our AI chat helper

I can help you find recruiting Tumor predisposition syndrome 3 studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

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

Get Signals for Tumor predisposition syndrome 3

Stay in the loop with community stories and updates from medical researchers.

HealthStoryfor Tumor predisposition syndrome 3

Create a living journal that talks back

HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Tumor predisposition syndrome 3 experiences more deeply and prepare for better conversations with your doctors and care team.

Start your journal

Your journal is private. Sharing your story publicly is a separate choice, made with Share your story above.