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SEER Inquiry System - Report
Produced: 05/04/2026 7:10 AM
Question 20081025
Inquiry Details
References:
2007 SEER Manual, C-1062. Appendix C
Question:
MP/H Rules/Histology--Anus: What is the correct histology code and MP/H histology rule to use for AIN-3 arising in a polyp? See Discussion.
Discussion:
Patient has colonoscopy with excision of small 5mm polyp in rectum (no mention of anus or anal canal); path reads out: AIN-3 (anal intraepithelial neoplasm grade 3).
In coding the histology using the "Other Sites" rules, H2 would be the first rule that applies for this case. However, we lose the fact that the AIN-3 arose in a polyp (H3). Is this how SEER wants these cases coded?
Answer:
For cases diagnosed 2007 or later, apply rule H2 and assign histology code 8077/2 (squamous intraepithelial neoplasia, grade III). Apply the rules in order, H2 precedes H3.
Cancer Site Category:
N/A
Data Item Category:
Histology
Other Category:
N/A
Year:
2008
