SEER Inquiry System - Question 20130165 Details

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Produced: 07/12/2025 7:06 PM

Question 20130165

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Inquiry Details

References:

2007 MP/H Rules

Question:

MP/H Rules/Multiple primaries--Thyroid: How many primaries are reported and what is histology for the papillary carcinomas if a Classical cytomorphology with a follicular architecture is on the right and a Columnar cell cytomorphology with a follicular and papillary architecture is on the left? See Discussion.

Discussion:

Dominant Tumor: Tumor

Laterality: Right lobe

Tumor Size: Greatest dimension: 9 cm

Histologic Type: Papillary carcinoma

Variant, specify: Classical

Architecture: Follicular

Cytomorphology: Classical

Tumor Size: Greatest dimension: 6 cm

Histologic Type: Papillary carcinoma

Variant, specify: Columnar cell

Architecture: Solid, follicular, and papillary

Cytomorphology: Columnar cell

The answer seems to hinge on whether or not the two tumors differ at the third digit of histology. Can we code the histology based on the terms listed for variant or architecture?

Answer:

This is a single thyroid primary. The tumors are both papillary carcinoma with follicular architecture for the most part. Apply Rule M6 and abstract a single primary.

Cancer Site Category:

Thyroid

Data Item Category:

N/A

Other Category:

Multiple primaries

Year:

2013