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SEER Inquiry System - Report
Produced: 01/21/2026 6:03 PM
Question 20031042
Inquiry Details
References:
#1: ICD-O-3
#2: Coding Complex Morph Dx's, 2. revised August 2002
Question:
Discussion:
1. How do we code colon: Adenocarcinoma with focal Mucinous adenoca? 8140/3 or 8255/3?
2. A lung lesion with predominant adenoca with focal areas of bronchioalveolar adenoca? 8140/3 or 8255/3?
3. Mixed infiltrating duct carcinoma and medullary ca? 8510/3 or 8255/3?
4. Mixed infil duct ca and focal medulary ca? 8510/3 or 8255/3?
Answer:
For tumors diagnosed prior to 2007:
1. 8140/3, Adenocarcinoma. Mucinous has a specific rule (see sinq 20010075): Include the mucinous component only if it is 50% or more of the tumor. "Focal" is not a majority term.
2. 8250/3, Bronchiolo-alveolar adenoca. Code the more specific histology.
3. 8523/3, Infiltrating duct mixed with other types of carcinoma. Combination of infiltrating duct and another type of carcinoma.
4. 8523/3, Infiltrating duct mixed with other types of carcinoma. Combination of infiltrating duct and another type of carcinoma.
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.
