title: Intravesical mitomycin C instillation as a prophylactic treatment of superficial bladder tumor.
abstract: A study was performed to determine the prophylactic efficacy of intravesical mitomycin C instillation in 43 patients with recurrent (more than 3), multiple (more than 3) or large (more than 3 cm.) superficial bladder tumors (stage Ta or T1). Of the patients 21 were treated with 8 weekly intravesical instillations of 40 mg. mitomycin C after transurethral resection and 22 were followed conventionally. The recurrence rate was 42.9 per cent in the mitomycin C group and 40.9 per cent in the controls during the first 3 months, and it was 81.0 and 77.3 per cent, respectively during 24 months. Recurrences per 100 patient-months were 8.7 and 8.9, respectively. Two patients in the mitomycin C group and 4 controls had recurrent tumors with progression in stage. We conclude tentatively from these observations that intravesical mitomycin C instillation is not effective in the prophylaxis of tumor recurrence in patients at high risk. This finding is contrary to other reports indicating a marked decrease in recurrence with mitomycin C.
authors.affiliation: Department of Urology, College of Medicine, Seoul National University, Korea.
authors.forename: H H
authors.initials: HH
authors.lastname: Kim
authors.forename: C
authors.initials: C
authors.lastname: Lee
mesh_terms: D000283:Administration, Intravesical; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D016685:Mitomycin; D008937:Mitomycins / Q000008:administration & dosage / Q000627:therapeutic use*; D009364:Neoplasm Recurrence, Local / Q000188:drug therapy*; D011897:Random Allocation; D012307:Risk Factors; D013997:Time Factors; D001749:Urinary Bladder Neoplasms / Q000188:drug therapy*
chemical_list: D008937:Mitomycins; D016685:Mitomycin