SEER Inquiry System - Question 20031025 Details

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Produced: 11/03/2025 10:28 AM

Question 20031025

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Inquiry Details

References:

#1: ICD-O-3, 67, 70

#2: Coding Complex Morph Dx's, 8, 13. Revised August 2002

Question:

Histology (Pre-2007): Is a small cell undifferentiated carcinoma coded to 8041/34 [small cell carcinoma undifferentiated] or to 8045/34 [combination small cell AND undifferentiated carcinoma] using terms from the 2 columns in Appendix 1 of Coding Complex Morphologic Diagnoses? See discussion.

Discussion:

Per pathology report, diagnosis is small cell undifferentiated carcinoma in biopsies taken from the laryngeal surface of the epiglottis and left false vocal cord.

Answer:

For tumors diagnosed prior to 2007:

Code histology as 8041/34 [small cell carcinoma, undifferentiated]. The diagnosis indicates that this is an undifferentiated small cell carcinoma, rather than a mixture of small cell carcinoma with undifferentiated carcinoma.

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:

2003