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Living with Porokeratosis of Mibelli

A skin condition that begins in childhood or young adulthood with brownish bumps that grow into slowly enlarging, raised patches.

Understanding Porokeratosis of Mibelli

Porokeratosis of Mibelli is a skin condition that usually develops in children or young adults.

It starts as one or a few small, brownish bumps that grow into raised, bumpy patches. The patches slowly get larger over time. GARD says it may sometimes harm the tissue under the patch, and it may develop into skin cancer.

Signs & symptoms

Symptoms vary from person to person. GARD lists these:

  • Small brownish bumps that grow into raised patches
  • Thickened, scaly skin
  • Itching
  • Sensitivity to the sun
  • Areas of thin or missing skin

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 genetic 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
Genetic specialists (geneticists); 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
How often should my patches be checked for skin cancer?
What treatments can slow or remove the patches?
How should I protect my skin from the sun?

Quick facts

Symptoms usually startfrom Childhood to Adulthood
InheritanceAutosomal Dominant

GARD says the cause is unknown. Possible risk factors include sunlight or other radiation, genetic factors and a weakened immune system. It can run in families in an autosomal dominant pattern.

GeneticSkin

Also known as: mibelli's disease; porokeratosis, mibelli

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Porokeratosis of MibelliGARD ID 4438 · 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 Porokeratosis of Mibelli.

Explore the Porokeratosis of Mibelli blog

Explore research for Porokeratosis of Mibelli

Explore actively recruiting Porokeratosis of Mibelli studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Porokeratosis of Mibelli 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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