Intravesical Mitomycin C After Diagnostic Ureteroscopy for Upper Tract Urothelial Carcinoma

Inclusion Criteria: * Suspected upper tract urothelial carcinoma (UTUC) * Diagnostic ureteroscopy required * Tumor suggestive of upper tract urothelial carcinoma (UTUC) found on ureteroscopy Exclusion Criteria: * Prior or concomitant urothelial carcinoma of the bladder * History of UTUC * Ureteroscopy within the preceding six months * Untreated urinary tract infection * Suspected or confirmed perforation of the upper or lower urinary tract * Lower urinary tract fistula * Leukopenia or thrombocytopenia * ECOG performance status 2 or greater * Known hypersensitivity to mitomycin C * Pregnancy or breastfeeding * Lack of capacity to consent