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Living with Kaposi sarcoma

A cancer of the cells lining blood or lymph vessels that often shows up as purple or dark patches on the skin.

Understanding Kaposi sarcoma

Kaposi sarcoma is a cancer that develops from the cells that line lymph or blood vessels.

It usually appears as tumors on the skin or inside the mouth. Skin patches or bumps may be purplish, reddish blue, or dark brown or black, usually on the legs and face. These often cause no symptoms. When tumors are in the lungs, liver, or digestive tract, they can cause problems such as bleeding or trouble breathing. There are four types: classic, endemic, iatrogenic (linked to immune-suppressing drugs), and AIDS-associated. It is mostly seen in adults.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Purple, reddish-blue, or dark skin patches
  • Skin bumps or nodules
  • Swollen lymph nodes
  • Lesions in the mouth
  • Bleeding or trouble breathing if organs are involved
  • Weakened immune function

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.

  3. Ask which tests can help

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

  4. Connect with expert centers

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

Care & treatment

Care team
Cancer specialists (oncologists)
Expert care
Expert lists: 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 The Skin Cancer Foundation 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
Which type of Kaposi sarcoma do I have?
Which tests show if organs such as the lungs or digestive tract are involved?
What treatments are available for my type?

Quick facts

Symptoms usually startAdult

It is caused by infection with a virus called Kaposi sarcoma associated herpesvirus (KSHV), also called human herpesvirus 8 (HHV8).

Also known as: kaposi's sarcoma; kaposi's sarcoma (clinical); kaposi's sarcoma (disease); kaposi's sarcoma of conjunctiva; kaposi's sarcoma of cornea; kaposi's sarcoma of lung

Patient organizations

Source: NIH GARD · Kaposi sarcomaGARD ID 6814 · 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 Kaposi sarcoma.

Explore the Kaposi sarcoma blog

Explore research for Kaposi sarcoma

Explore actively recruiting Kaposi sarcoma studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Kaposi sarcoma 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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