The value of various protocols of mitomycin C and adriamycin instillation for the prevention of recurrent tumors in patients whose superficial bladder tumors (TA, T1) had been removed by transurethral resection was compared in a prospective multicenter study. Three-year and short-term instillation protocols were compared with each other and with the combination of the two. Evaluation after a mean follow-up of 20 months confirmed our previous conclusion of the great value of cytostatic bladder instillation to prevent recurrent tumors and tumor progression in patients with superficial bladder carcinoma. There is no significant difference between long-term and short-term prophylaxis, but combination has achieved the best results. Similar results were obtained with adriamycin and mitomycin but adriamycin was less well tolerated.
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