SEER Inquiry System - Report
Produced: 10/14/2025 3:27 PM
Question 20021034
Inquiry Details
References:
#1: Coding Complex Morph Dx's, 2. August 2002
#2: SINQ. 20010097, 20010075
Question:
Discussion:
Answer:
For tumors diagnosed prior to 2007:
Code the Histology field to 8263/3 [adenocarcinoma in a tubulovillous adenoma]. Because the mucinous component involves less than 50% of the tumor, the histology is not coded to mucinous. For mucinous only, the tumor must be at least 50% mucinous, mucin producing, to be coded to the specific histology.
For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.