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SEER Inquiry System - Report
Produced: 12/27/2025 5:12 PM
Question 20190005
Inquiry Details
References:
Solid Tumor Rules. Urinary Sites
Question:
Primary Site--Bladder: Does instruction #4 in the Urinary Sites Solid Tumor Rules Instructions for Coding Primary Site apply to a mix of in situ and invasive urothelial tumors?
Instruction #4: Code Urinary System NOS C689 when there are multiple non-contiguous tumors in multiple organs within the urinary system.
See Discussion.
Discussion:
Example: Patient has multiple biopsies with final diagnosis of in situ papillary urothelial carcinoma in the prostatic urethra and invasive papillary urothelial carcinoma in the bladder.
How should primary site be coded in this type of mixed in situ and invasive situation?
Answer:
Code Urinary System NOS C689 for this case since there are two separate urinary sites involved. Apply instruction #4 when there is a mix of in situ and invasive urothelial tumors.
