SEER Inquiry System - Question 20110024 Details

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Question 20110024

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References:

#1: 2010 SEER Manual. Appendix C

#2: Subject matter expert

Question:

MP/H Rules/Histology--Breast: How is histology coded, and which MP/H rule applies for a diagnosis of ductal carcinoma in situ with clear cell features? See Discussion.

Discussion:

None of the histology rules for in situ breast seem to apply to this case:

Rule H3 doesn't seem to apply because "clear cell" is not a specific intraductal carcinoma.

Rule H6 doesn't seem to apply because there is not a combination of intraductal and 2 or more specific types of intraductal.

Rule H8 wouldn't apply because one of the types is intraductal.

Answer:

For cases diagnosed 2007 or later:

Code 8523/2 [intraductal carcinoma mixed with other types of in situ carcinoma]. Rule H6 should apply to this case.

The wording in the Rule H6 needs to be clarified to handle a case of intraductal carcinoma with one or more subtypes that are not ductal. This will also require a modification to Table 3. A row needs to be added to the table labeled, "Intraductal and one or more of the histologies in Column 2." The Column 3 text for the newly added row would read, " Intraductal mixed with other types of carcinoma." The appropriate histology code to be reported per Column 4 would be 8523/2. This will be done in the next revision of the rules.

Cancer Site Category:

Breast

Data Item Category:

Histology

Other Category:

N/A

Year:

2011