Tumor Tip of the Week 09-26-2025 Bladder Behavior when no information regarding invasion

09-26-2025

Scenario: 

• TURBT: Low Grade Urothelial Carcinoma (No other information available regarding invasion) 

Question: How will you assign behavior code? 

• /2 
• /3 

Answer: /2 

SEER Appendix C Coding Guidelines Bladder – 

Code the behavior as in situ (/2) when 

• The diagnosis is low grade urothelial carcinoma AND there is no information regarding invasion 

Be sure to review the Coding Guidelines for more helpful tips!