SEER Inquiry System - Question 20021127 Details

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Question 20021127

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Inquiry Details

References:

ICD-O-3, 29, 32. Rule F, Rule H

Question:

Histology (Pre-2007)/Behavior Code--Thyroid: What code is used to represent the histology "micropapillary carcinoma" of the thyroid? See discussion.

Discussion:

The ICD-O-3 includes "micropapillary intraductal (C50._)" [8507/2], "micropapillary serous (C56.9)" [8460/3] and "micropapillary transitional cell (C67._) [8131/3] but does not seem to include a micropapillary code for a thyroid primary.

Answer:

For tumors diagnosed prior to 2007:

Code the Histology field to 8507/3 [micropapillary carcinoma]. According to rule H, the topography code listed in the ICD-O is disregarded if the tumor is known to arise in another site. In this case, the site is thyroid [C73.9] so the topography code of breast [C50._] can be disregarded for this histology. Apply the matrix principle to change the Behavior Code from 2 to 3.

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

Cancer Site Category:

Thyroid

Data Item Category:

Behavior, Histology

Other Category:

N/A

Year:

2002