Objective: To compare and evaluate the efficacy and tolerance of intravesical instillation of Bacillus Calmette-Guerin (BCG) and interferon alpha-2b immunotherapy for superficial transitional cell carcinoma (TCC) of the urinary bladder.
Methods: Thirty-five patients with superficial TCC of the urinary bladder, primary and recurrent tumors, stage Ta, T1, and grade 1 and 2, were prospectively enrolled for intravesical immunotherapy at the Armed Forces Hospital, Riyadh, Kingdom of Saudi Arabia between January 1992 and December 2000. The treatment regimes used were either 120 mg of BCG weekly for 6 weeks followed by a 2nd 6 week course given only on first tumor recurrence, or 50 million i.