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SEER Inquiry System - Report
Produced: 10/04/2025 7:09 PM
Question 20180008
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
