Low-grade appendiceal mucinous neoplasm and pseudomyxoma peritonei
Prepared with OnCo (onco.cc/prep/low-grade-appendiceal-mucinous-neoplasm/). Orientation, not medical advice; your team knows your case.
My details
What I know, what is unclear, changes to discuss
Saved in this browserMy questions
16 on the sheet- 1.What is my exact diagnosis, stage, and grade, and which tests established them?
- 2.Which biomarkers have been tested on my tumour (for example PSOGI grade of the peritoneal disease, Peritoneal cancer indexand completeness of cytoreduction score, GNAS mutation, KRAS; TP53 and SMAD4, CEA, CA 19-9 and CA-125, Perforation and extra-appendiceal mucin on the appendicectomy specimen), and what were the results?
- 3.Which subtype is my cancer, and does that change the recommended treatment?
- 4.Is germline (inherited) genetic testing recommended for me or my family?
- 5.For my situation (lamn confined to the appendix), which of the standard options do you recommend and why?
- 6.For my situation (pseudomyxoma peritonei, resectable), which of the standard options do you recommend and why?
- 7.Am I a candidate for Mitomycin C, and what side effects should I expect?
- 8.For my situation (high-grade pseudomyxoma peritonei), which of the standard options do you recommend and why?
- 9.Am I a candidate for FOLFOX (5-FU, leucovorin, oxaliplatin), CAPOX (capecitabine, oxaliplatin), and what side effects should I expect?
- 10.For my situation (unresectable or recurrent disease), which of the standard options do you recommend and why?
- 11.Am I a candidate for FOLFOX (5-FU, leucovorin, oxaliplatin), and what side effects should I expect?
- 12.Are there clinical trials I could join, for example of HIPEC / PIPAC (intraperitoneal chemotherapy), HIPEC perfusion pumps and PIPAC nebulisers?
- 13.Would a second opinion at a high-volume centre change anything, and can you help arrange it?
- 14.What supportive care (symptom control, nutrition, exercise, mental health, financial help) is available from the start?
- 15.I read that “Cytoreduction with HIPEC has never been compared with cytoreduction alone in this disease”. How does that affect my plan?
- 16.I read that “Recurrence after complete cytoreduction is common and criteria for reoperation vary”. How does that affect my plan?
The words I may hear
- Debulking (cytoreductive surgery): Surgery that removes as much tumour as possible when it cannot all be removed cleanly; leaving nothing visible behind is what matters.
- HIPEC (hyperthermic intraperitoneal chemotherapy): After surgeons remove all visible tumour from the abdominal lining, the abdomen is bathed for 60-90 minutes in heated chemotherapy to kill the microscopic cells left behind.
- Colectomy: Removing the part of the colon containing the cancer along with its blood supply and lymph nodes, then joining the ends.
- Peritoneum and peritoneal metastases: The thin membrane lining the abdominal cavity and covering the bowel.
- Peritoneal metastasis: Spread across the lining of the abdomen, the most common way stomach cancer recurs and the hardest to treat.
Tests and results to bring
Biomarker results to ask for: PSOGI grade of the peritoneal disease (acellular, low, high, signet ring), Peritoneal cancer index (extent) and completeness of cytoreduction score, GNAS mutation (low grade), KRAS; TP53 and SMAD4 (high grade), CEA, CA 19-9 and CA-125 (prognosis and surveillance), Perforation and extra-appendiceal mucin on the appendicectomy specimen.
Scans and tests linked to this cancer: CT (computed tomography), MRI.
Bring copies of scan reports, pathology and blood results, and a list of every medicine and supplement.
The treatments I may be offered
- Pseudomyxoma peritonei, resectable: Complete cytoreductive surgery (peritonectomy and organ resection) with hyperthermic intraperitoneal chemotherapy, mitomycin or oxaliplatin, in a specialist centre. (HIPEC / PIPAC (intraperitoneal chemotherapy), HIPEC (hyperthermic intraperitoneal chemotherapy), Mitomycin C, Peritoneal metastasis, Debulking (cytoreductive surgery))
- Unresectable or recurrent disease: Repeat cytoreduction where feasible; debulking for symptoms; systemic chemotherapy only for high-grade histology; trials of mucolytics and pressurised intraperitoneal aerosol chemotherapy. (Debulking (cytoreductive surgery), HIPEC perfusion pumps and PIPAC nebulisers, FOLFOX (5-FU, leucovorin, oxaliplatin))
- LAMN confined to the appendix: Appendicectomy with clear margin; no right hemicolectomy; surveillance imaging if mucin was found outside the appendix. (Colectomy, CT (computed tomography))
- High-grade pseudomyxoma peritonei: Cytoreductive surgery with HIPEC, with perioperative systemic chemotherapy (FOLFOX or CAPOX) as for appendiceal adenocarcinoma. (HIPEC / PIPAC (intraperitoneal chemotherapy), FOLFOX (5-FU, leucovorin, oxaliplatin), CAPOX (capecitabine, oxaliplatin))
From the standard of care recorded for this cancer; which apply depends on your stage and biomarkers. Ask which the team recommends and why.