RATIONALE: Biological therapies such as BCG use different ways to stimulate the immune system and stop cancer cells from growing. PURPOSE: This randomized phase III trial is studying four different regimens of BCG and comparing how well they work in treating patients who have undergone surgery for bladder cancer.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Dose equivalency with respect to duration of disease free interval, recurrence rate, percentage of patients with an increase in T-category to greater than T1, and the incidence of carcinoma in situ during follow-up
Dose equivalency in terms of fewer local and systemic side effects