SEER Inquiry System - Question 20071101 Details

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SEER Inquiry System - Report

Produced: 06/06/2026 10:35 AM

Question 20071101

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Inquiry Details

References:

2007 SEER Manual, 90-91

Question:

Multiplicity Counter/CS Tumor Size: The Multiplicity Counter rule 6c states "Use code 99 when the tumor is described as diffuse". Is code 99 used in all circumstances when tumor size is coded to 998? See Discussion.

Discussion:

The CS manual lists esophagus, stomach, familila/familial polyposis (colon), lung, and breast as the only circumstances when code 998 is valid. If this is correct, then if TS is coded to 998, then Multiplicity Counter must be 99.

Answer:

If the number of tumors is known, code the number in Multiplicity Counter. If the number of tumors is not known, assign code 99. If "diffuse" is the only information available to describe the tumor, assign code 99.

Cancer Site Category:

N/A

Data Item Category:

N/A

Other Category:

N/A

Year:

2007