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SEER Inquiry System - Report
Produced: 10/22/2025 11:13 PM
Question 20081131
Inquiry Details
References:
2007 SEER Manual, C-305. Appendix C
Question:
MP/H Rules--Colon: What histology would you assign to a single tumor with the histology 'well differentiated mucinous cystadenocarcinoma in a villous adenoma confined to the appendix'? Does rule H4 apply to this diagnosis or should we continue on in the rules to H14 and code the higher histology?
Discussion:
Answer:
For cases diagnosed 2007 or later, use rule H4.
Stop at the first rule that applies to the case. Rule H4 is the first rule that applies.
The polyp rule, H4, comes before many of the other colon rules because it is important to know that the malignancy originated in a polyp.
Cancer Site Category:
Colon
Data Item Category:
N/A
Other Category:
N/A
Year:
2008
