SEER Inquiry System - Report
Produced: 10/16/2025 4:07 AM
Question 20021062
Inquiry Details
References:
#1: ICD-O-3, 81
#2: Coding Complex Morph Dx's, 3. Revised August 2002
Question:
Discussion:
Answer:
For tumors diagnosed prior to 2007:
Code the Histology field to 8570/3 [Adenocarcinoma with squamous metaplasia]. Our pathology consultant agrees that squamous metaplasia is synonymous with squamous differentiation.
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.