SEER Inquiry System - Question 20021178 Details

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Produced: 03/24/2026 12:03 AM

Question 20021178

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Inquiry Details

References:

ICD-O-3

Question:

Histology (Pre-2007): What code is used to represent the histology "poorly differentiated invasive transitional cell carcinoma with extensive squamous and focal glandular differentiation"?

Discussion:

Answer:

For tumors diagnosed prior to 2007:

Code the Histology field to 8120/33 [transitional cell carcinoma, NOS, poorly differentiated]. The ICD-O-3 does not have a separate code for transitional cell carcinoma with squamous and/or glandular differentiation.

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:

N/A

Data Item Category:

Histology

Other Category:

N/A

Year:

2002