Collaborative Stage

Note 1: Code the applicable World Health Organization (WHO) or International Society of Urological Pathology (ISUP) grade as documented in the pathology report for urothelial carcinomas only. Information about urothelial histology and grade may be taken from any section of the pathology report where documented, such as a microscopic description, synoptic template, or final diagnosis. If the tumor is of mixed histology including urothelial carcinoma, code grade as specified for the urothelial component.
Note 2: If the term low grade (LG) or high grade (HG) is indicated for a urothelial primary, assume it is a WHO/ISUP grade.
Note 3: If the tumor morphology does not include a urothelial component, use code 987.
Note 4: If a grade system other than WHO/ISUP is documented for a urothelial primary, code 999.

Code	Description
010	Low grade urothelial carcinoma
020	High grade urothelial carcinoma
888	OBSOLETE DATA CONVERTED V0200 See code 988 Not applicable for this site
987	Not applicable: Not a urothelial morphology
988	Not applicable: Information not collected for this case (May include cases converted from code 888 used in CSv1 for "Not applicable" or when the item was not collected. If this item is required to derive T, N, M, or any stage, use of code 988 may result in an error.)
998	No pathologic examination of primary site
999	Unknown WHO/ISUP grade Not documented in patient record

CS Site-Specific Factor 1
WHO/ISUP Grade