SEER Inquiry System - Report
Produced: 10/06/2025 10:06 PM
Question 20120057
Inquiry Details
References:
#1: ICD-O-3
#2: Subject matter expert
Question:
Discussion:
Answer:
This diagnosis is not reportable. Cystadenoma is not reportable. The "in situ" description in this case does not make cystadenoma reportable.
According to our expert pathologist consultant, this is a "non-invasive, low grade, epithelial proliferation in an often cystic appendiceal tumor, 8480/1. If this has leaked or ruptured it can seed the peritoneal cavity causing pseudomyxoma peritonei."