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SEER Inquiry System - Report
Produced: 11/26/2024 5:34 PM
Question 20160050
Inquiry Details
References:
WHO Class Digest System Tumors
Question:
Reportability--Appendix: Is a mucinous cystic neoplasm with high grade dysplasia of the appendix reportable? See discussion.
Discussion:
The language appears similar to the mucinous cystic neoplasm of the pancreas with high grade dysplasia (8470/2), which was clarified to be reportable in 2014.
Answer:
WHO does not list MCN as a histology for the appendix. This case should be clarified with the pathologist.
For pancreas specifically, the term "mucinous cystic neoplasm (MCN) with high grade dysplasia" replaced the term "mucinous cystadenocarcinoma, noninvasive" according to WHO. MCN with high grade dysplasia of the pancreas is reportable because it is used in place of the now obsolete terminology. If we did not make the new terminology reportable, trends over time could be affected.
