SEER Inquiry System - Question 20180008 Details

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Produced: 10/29/2025 9:38 AM

Question 20180008

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Inquiry Details

References:

#1: 2007 MP/H Rules. Other; table 2

#2: WHO Class Endocrine Tumors, 84. 4th edition

Question:

MP/H Rules/Multiple primaries--Thyroid: Is medullary carcinoma of the right lobe of the thyroid, with foci of papillary microcarcinoma in both lobes, one primary with mixed histology (8347/3) or two separate primaries?

Discussion:

Answer:

For cases diagnosed prior to 2018

Abstract two primaries, Medullary (8510/3) and papillary microcarcinoma (8260/3). Other sites rule M17 applies.

Cancer Site Category:

Thyroid

Data Item Category:

N/A

Other Category:

Multiple primaries

Year:

2018