Short answer · Medically reviewed summary · Last updated: 2026-05-08
Pseudomyxoma peritonei (PMP) is a rare condition with an estimated annual incidence of approximately 1 to 2 cases per million people. Because pseudomyxoma peritonei is often diagnosed only after it has progressed, these figures may underestimate the true prevalence, as early-stage disease is frequently overlooked or misdiagnosed. What is the estimated prevalence and incidence of pseudomyxoma peritonei? Epidemiological data for pseudomyxoma peritonei is challenging to pinpoint, but it is generally classified as a rare disease.
1 people with Pseudomyxoma Peritonei have shared their first-person experience on this question at DiseaseMaps.
What is the prevalence of Pseudomyxoma Peritonei?
Prevalence of Pseudomyxoma Peritonei: how many people are affected worldwide, differences by sex and region, with sources.
Pseudomyxoma peritonei (PMP) is a rare condition with an estimated annual incidence of approximately 1 to 2 cases per million people. Because pseudomyxoma peritonei is often diagnosed only after it has progressed, these figures may underestimate the true prevalence, as early-stage disease is frequently overlooked or misdiagnosed.
What is the estimated prevalence and incidence of pseudomyxoma peritonei?
Epidemiological data for pseudomyxoma peritonei is challenging to pinpoint, but it is generally classified as a rare disease. Global incidence is estimated at 1–2 per million individuals annually. In the DiseaseMaps.org community, 110 people with pseudomyxoma peritonei have joined to share their experiences, providing a valuable, real-world perspective on a condition that is often under-reported in traditional clinical databases.
Who is most commonly affected by pseudomyxoma peritonei?
While pseudomyxoma peritonei can occur at any age, it is most frequently diagnosed in adults between the ages of 40 and 60. There is no significant evidence of ethnic or geographic clustering for the disease. Regarding gender distribution, historical data suggests a slight variation based on the primary tumor site (most commonly the appendix), but both men and women are affected by this condition.
Why is accurate data for pseudomyxoma peritonei difficult to track?
Accurate prevalence data for pseudomyxoma peritonei remains difficult to capture for several clinical reasons:
- Misdiagnosis: Symptoms often mimic other abdominal issues, leading to initial misidentification.
- Asymptomatic stages: The disease can remain indolent for long periods before clinical presentation.
- Diagnostic variance: Lack of standardized reporting in global cancer registries leads to undercounting.
- Primary site complexity: PMP is often secondary to appendiceal tumors, complicating how cases are categorized in medical records.
Next steps
- Consult with a surgical oncologist specializing in peritoneal surface malignancies.
- Join the DiseaseMaps.org community to connect with other patients and caregivers.
- Review clinical trial registries such as ClinicalTrials.gov for the latest research on pseudomyxoma peritonei treatment.
Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding a medical condition.
References
- Orphanet: Pseudomyxoma peritonei (ORPHA:760)
- NIH GARD (Genetic and Rare Diseases Information Center): Pseudomyxoma peritonei
- PubMed: Global incidence and clinical management of appendiceal neoplasms
- DiseaseMaps.org: Community patient registry and insights
Posted Aug 13, 2017 by Alice 2000
