How to refer a patient with appendix cancer.
Early referral to a peritoneal surface malignancy center is the single most important decision after diagnosis.
When you refer a patient with known or suspected appendix cancer, timing is everything. Appendiceal cancer is often found by surprise, on a pathology report after appendectomy or on imaging read as something else. What happens next matters. A considered first operation at an experienced center protects options that a repeat, non-therapeutic surgery can take away. This page covers when to refer, what to send, and where.
When to refer a patient
Refer early, and refer before any additional abdominal surgery, in any of these situations:
Any appendiceal mucinous neoplasm
LAMN or HAMN, including cases that look confined. Mucinous tumors can seed the peritoneum silently.
Mucin outside the appendix
Acellular or cellular mucin on or beyond the appendix, or any finding suggestive of pseudomyxoma peritonei.
Appendiceal adenocarcinoma
Mucinous or non-mucinous, any grade, and goblet cell adenocarcinoma.
Mucinous ovarian tumor
A mucinous ovarian mass can be appendiceal in origin. Evaluate the appendix before assuming a primary ovarian tumor.
Peritoneal deposits
Peritoneal nodules or ascites of unclear origin in a patient with an appendiceal specimen.
Uncertainty
When the pathology or the plan is unclear, a second read and a specialist opinion cost little and change outcomes.
What to send
A peritoneal surface malignancy center can triage quickly with the pathology report and slides or blocks for review, the operative note, recent cross-sectional imaging, and any tumor markers. A formal pathology re-review at the treating center is routine and often changes the classification.
How to refer
- Identify the case. Any of the triggers above is reason enough. When in doubt, treat it as a reason to refer a patient onward.
- Pause further surgery. Avoid additional abdominal operations until a peritoneal center has weighed in, unless the patient needs urgent care.
- Gather records. Pathology, operative note, imaging, and markers, ready to send.
- Find a center. Use our directory of medical centers and providers to locate an experienced CRS and HIPEC program.
- Point the patient to the registry. It takes about fifteen minutes and strengthens the evidence base every specialist relies on.
Why the timing matters
The reason to refer a patient early is simple. In appendiceal cancer, the abdomen is the field that decides the outcome, and the best chance to clear it is the first complete operation at a center that does this often. A second surgery in the wrong setting can scar the field and remove the option of a clean cytoreduction later. You do not need to have the full plan worked out before you pick up the phone. A specialist center will take it from there. The most valuable thing a referring clinician does is make the connection early, before the window narrows.
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