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SEER Inquiry System - Report
Produced: 09/15/2025 4:00 PM
Question 20190014
Inquiry Details
References:
2018 SEER Manual, 102. final version
Question:
Reportability--Behavior: Is reportable if it shows invasion or microinvasion pathologically? See Discussion.
Discussion:
The SEER Manual states, Generally, this rule is invoking the Matrix principle in the ICD-O-3.
We are aware this is not the same as a VIN III or an adenoma with microinvasion because those tumors have a valid histology code listed in the ICD-O-3. The terms or or do not have a valid ICD-O-3 code to apply the Matrix principle.
If severe dysplasia is felt to be consistent with a carcinoma in situ, then a severe dysplasia with microinvasion would be reportable as 8010/3. But in the U.S., we do not accession severe dysplasia as equivalent to carcinoma in situ unless the pathologist also states the severe dysplasia is equivalent to carcinoma in situ (e.g., ).
Answer:
Severe dysplasia alone is not reportable. No further instructions apply because this term is not reportable.In order to use the instructions for behavior, you must first have a reportable neoplasm.
If carcinoma in situ is mentioned and there is microinvasion, code the behavior as /3 according to the instructions in the SEER manual.
You are correct, do not accession severe dysplasia as equivalent to carcinoma in situ unless the pathologist also states the severe dysplasia is equivalent to carcinoma in situ (e.g., ).
