SEER Inquiry System - Question 20081041 Details

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Question 20081041

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Inquiry Details

References:

2007 SEER Manual, C-1059. Appendix C

Question:

MP/H Rules/Histology--Thyroid: How many primaries are to be reported and what histology is to be coded for an anaplastic/undifferentiated thyroid carcinoma with sarcomatoid transformation likely arising in association with a papillary thyroid carcinoma? Thyroid contains one tumor: 12.5 cm in greatest dimension...almost completely replaces entire thryroid gland.

Discussion:

Answer:

For cases diagnosed 2007 or later:

This is a single primary using rule M2; a single tumor is always a single primary.

The histology code for this case is 8260/3 [Papillary carcinoma of thyroid]. Begin with Histology Coding rule H8. Stop at rule H17 and code the histology with the numerically higher ICD-O-3 code.

Cancer Site Category:

Thyroid

Data Item Category:

Histology

Other Category:

N/A

Year:

2008