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Living with Primary peritoneal carcinoma

A rare cancer that starts in the lining of the abdomen and looks like ovarian cancer; it almost always affects women.

Understanding Primary peritoneal carcinoma

Primary peritoneal carcinoma is a rare cancer that starts in the peritoneum, the lining of the abdomen, and resembles a type of ovarian cancer.

Serous adenocarcinoma is the most common type. It affects women almost exclusively and usually appears in adulthood. The diagnosis can be made only if the ovaries are not involved, or if involved, the tumor is on the ovary surface only and the peritoneum is more involved.

Signs & symptoms

Symptoms vary from person to person. GARD lists these:

  • Swollen or bloated belly
  • Abdominal pain
  • Constipation
  • Nausea and vomiting
  • Inflammation of the abdominal lining (peritonitis)

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.

Care & treatment

Care team
Cancer specialists (oncologists)
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 American Cancer Society
  • 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 was this distinguished from ovarian cancer?
What treatment options are available?
Is genetic counseling or testing recommended for me or my family?

Quick facts

Symptoms usually startAdult

GARD doesn't describe a cause for this condition yet.

Also known as: eoppc; extra-ovarian primary peritoneal carcinoma; ppc; primary peritoneal cancer; primary peritoneal carcinoma (disease); primary peritoneal serous carcinoma

Patient organizations

Source: NIH GARD · Primary peritoneal carcinomaGARD ID 20103 · 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 Primary peritoneal carcinoma.

Explore the Primary peritoneal carcinoma blog

Explore research for Primary peritoneal carcinoma

Explore actively recruiting Primary peritoneal carcinoma studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Primary peritoneal carcinoma 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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I can help you find recruiting Primary peritoneal carcinoma 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.

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