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Question: 20120089 Status
Final

References
Source 1:   2007 MP/H Rules
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Notes:  
Source 2:   ICD-O-3
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Notes:  


Question
MP/H Rules/Histology--Colon: The final diagnosis on a path report for a colon specimen says: Is a colon specimen final diagnosis of carcinoma in situ in a serrated adenoma coded to 8010/2, 8210/2 or 8213/2?



Discussion


Answer
For cases diagnosed 2007 or later, code the histology as 8213/2 [carcinoma in situ in a serrated adenoma].

The steps used to arrive at this decision are:

Step 1: Apply ICD-O-3 rule F (Matrix principle) and assign the behavior code /2 when the behavior assigned by the pathologist differs from the usual behavior as given in the ICD-O-3.

Step 2: Open the Multiple Primary and Histology Coding Rules Manual. Choose one of the three formats (i.e., flowchart, matrix or text) and go to the Colon Histology rules.

Step 3: Start at the SINGLE TUMOR module, Rule H1. The rules are intended to be reviewed in consecutive order within a module. Stop at rule H4. Code the histology as 8213/2.

Note: The histology 8213 (adenocarcinoma in serrated adenoma) will be added to rule H4 in the next revision.



History


Last Updated
07/01/2014

Date Finalized
12/14/2012