SEER Inquiry System - Question 20100102 Details

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Produced: 10/04/2025 6:54 PM

Question 20100102

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Inquiry Details

References:

2010 SEER Manual, 71

Question:

Behavior--Breast: How is behavior coded when a biopsy shows in situ carcinoma with a focus suspicious for invasion and a subsequent excision/resection shows only in situ carcinoma?

Discussion:

Answer:

Code this case as in situ. The specimen from the excision/resection is the more reliable source for determining behavior, compared to a biopsy, especially in this case where the behavior is ambiguous on the biopsy.

Cancer Site Category:

Breast

Data Item Category:

Behavior

Other Category:

N/A

Year:

2010