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SEER Inquiry System - Report
Produced: 10/26/2025 9:09 PM
Question 20100002
Inquiry Details
References:
#1: 2007 SEER Manual, 262. Appendix C
#2: AJCC Cancer Staging Manual. 6th ed
Question:
Reportability/Histology--Colon: Is a colon tumor reportable if the pathology report final diagnosis is high grade dysplasia but CAP protocol histologic type designation is adenocarcinoma in situ? See Discussion.
Discussion:
The microscopic description and the final diagnosis on the pathology report indicate the tumor is a large tubulovillous adenoma of the cecum with focal surface high grade dysplasia. The CAP protocol histologic type designation is adenocarcinoma in situ and pT designation is pTis. Which has priority? Is the case reportable?
Answer:
The case is reportable because carcinoma in situ is stated. Carcinoma in situ has higher priority than severe dysplasia or high grade dysplasia.
Per AJCC 6th edition colon chapter, the terms "high grade dysplasia" or "severe dysplasia" may be synonymous with carcinoma in situ. Because the pathologist gave carcinoma in situ information within the CAP, (s)he is apparently defining the dysplasia as in situ carcinoma.
Cancer Site Category:
Colon
Data Item Category:
Histology
Other Category:
Reportability
Year:
2010
