SEER Inquiry System - Question 20180096 Details

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Produced: 10/04/2025 10:00 AM

Question 20180096

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Inquiry Details

References:

#1: WHO Class Digest System Tumors, 102-103. 4th ed.

#2: Subject matter expert

Question:

Reportability/Histology--Small intestine: Is a neuroendocrine microtumor of the duodenum a reportable tumor? See Discussion.

Discussion:

This comment was added to the pathology report by the pathologist: A focus of neuroendocrine microtumor measured 350 micrometers, qualifying as a neuroendocrine microtumor. Focus was immunohistochemically positive for chromogranin and synaptophysin and negative for gastrin. The Ki-67/CD45 immunostain showed <1% positivity in microtumor.

Answer:

Neuroendocrine microtumor of the duodenum is reportable as 8240/3. "Microtumor" pertains to the size/amount of NET and not to a histologic type.

Cancer Site Category:

N/A

Data Item Category:

Histology

Other Category:

Reportability

Year:

2018