An official website of the United States government
Home
SEER Inquiry System - Report
Produced: 08/28/2025 1:10 PM
Question 20091079
Inquiry Details
References:
2007 SEER Manual, C-841. Appendix C
Question:
Primary site--Bladder: What is the correct subsite for "interureteric ridge"? See Discussion.
Discussion:
Description: 4 mm nodule at base of bladder near interureteric ridge.
Answer:
For this case, assign code C670 [Trigone of bladder]. The description for this case states that the tumor location is the base of the bladder. Base is a synonym for trigone.
The interureteric ridge (or interureteric crest, or interureteric fold) is a fold of mucous membrane extending accross the bladder between the two ureteric orifices. The trigone is located below the interureteric ridge.
Cancer Site Category:
Bladder
Data Item Category:
Primary site
Other Category:
N/A
Year:
2009
