What Is Appendiceal Cancer and Pseudomyxoma Peritonei and How Do Families Plan for End of Life?
By CRYSTAL BAI •
The short answer: Appendiceal cancers and pseudomyxoma peritonei (PMP) are rare tumors arising from the appendix that spread to the peritoneal cavity. Well-differentiated PMP can be controlled for years with CRS-HIPEC; high-grade appendiceal cancers are more aggressive and require earlier palliative care planning.
Understanding Appendiceal Cancer and PMP
Appendiceal neoplasms range from benign mucinous cystadenomas to aggressive adenocarcinomas. Pseudomyxoma peritonei (PMP) — the peritoneal spread of mucinous appendiceal tumors — is the most common presentation. Low-grade PMP (formerly DPAM) has excellent prognosis with CRS-HIPEC; high-grade PMP and appendiceal adenocarcinoma have worse outcomes.
CRS-HIPEC for Appendiceal Cancer
Cytoreductive surgery (CRS) combined with HIPEC (hyperthermic intraperitoneal chemotherapy) is the standard of care for resectable PMP. Centers with high-volume experience achieve 10-year survival rates of 70%+ for low-grade PMP — remarkable outcomes for a peritoneal cancer.
When Disease Becomes Unresectable
Repeated CRS-HIPEC procedures may be performed for recurrent PMP, but eventually disease becomes unresectable. High-grade appendiceal adenocarcinoma may not respond well to HIPEC and requires systemic chemotherapy. At these stages, palliative care and end-of-life planning are essential.
Systemic Therapy for Advanced Disease
Appendiceal adenocarcinoma is often treated with FOLFOX or FOLFIRI chemotherapy (similar to colorectal cancer). Bevacizumab and targeted agents (based on molecular profiling) may be incorporated. PMP Foundation and appendix cancer-specific organizations provide patient community.
Frequently Asked Questions
What is pseudomyxoma peritonei?
Pseudomyxoma peritonei (PMP) is a clinical syndrome caused by mucinous appendiceal tumor cells spreading to the peritoneal cavity, producing jelly-like mucin throughout the abdomen. Low-grade PMP has excellent prognosis; high-grade forms are more aggressive.
Is appendiceal cancer curable?
Low-grade appendiceal PMP treated with CRS-HIPEC at specialized centers has excellent long-term outcomes — 70%+ 10-year survival in some series. High-grade appendiceal adenocarcinoma has worse prognosis.
Can a death doula help with appendiceal cancer end-of-life planning?
Yes — when appendiceal cancer progresses beyond surgical control, death doulas help families with advance care planning, legacy work, and emotional support during the transition to palliative care.
Where are appendiceal cancer/PMP specialists?
CRS-HIPEC for PMP is best performed at high-volume centers. PMP Foundation (pmpprf.org) and ACPMP Research Foundation maintain lists of specialized centers.
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