Atezolizumab in Treating Patients With Recurrent BCG-Unresponsive Non-muscle Invasive Bladder Cancer

Inclusion Criteria

• Patients must have histologically proven, recurrent, non-muscle invasive urothelial carcinoma of the bladder within 60 days prior to registration; the carcinoma must be stage T1 high-grade, stage CIS, or stage Ta high-grade
• Patients with mixed urothelial carcinoma and a glandular and/or squamous component will be eligible for the trial, but the presence of other histologic variants, pure adenocarcinoma, or pure squamous cell carcinoma, or pure squamous carcinoma in situ will make a patient ineligible
• Patients must have had all visible tumor resected completely within 60 days prior to registration; CIS disease is not expected to be completely excised; all patients must have tumor tissue from the histologic diagnosis of recurrence available for central pathology review submission; failure to submit these materials will make the patient ineligible for this study
• Patients must have had cystoscopy confirming no visible papillary tumor within 21 days prior to registration; (CIS disease is not expected to have been completely excised); if the transurethral resection of bladder tumor (TURBT) or bladder biopsy falls within 21 days of registration it will fulfill this criterion
• Patients must have had urine cytology within 21 days prior to registration; cytology for patients with CIS component is not expected to be negative for malignant cells; if the cytology for male patients with only Ta/T1 disease in the absence of CIS is positive for malignant cells, patient must have had a biopsy of the prostatic urethra within the previous six months
• All patients with T1 urothelial carcinoma at study entry must undergo re-TURBT within 60 days prior to registration, and must have evidence of uninvolved muscularis propria in the pathologic specimen from either the first or the second TURBT; tissue from the re-resection must be submitted for central review in addition to the tissue from the first TURBT; the TURBT that identified the recurrent T1 disease may have taken place more than 60 days prior to registration but not more than 120 days; patients with high grade Ta or CIS do not require a re-TURBT, but if this is performed at the discretion of the treating physician, the second TURBT must be within 60 days of registration; there is no requirement for muscularis propria in the specimen of Ta/CIS patients, but the tissue from the first and second TURBTs must be submitted for central review; if a patient with Ta/T1 disease undergoes repeat TURBT, the patient will be stratified as having CIS if there is CIS on either TURBT
• Patients must not have had urothelial carcinoma in the prostatic urethra within the previous 24 months or muscle invasive urothelial carcinoma of the bladder at any time; patients with prior urothelial carcinoma in the upper urinary tract within the previous 24 months will only be eligible if they had = = 5 doses) and first round maintenance (>= 2 doses) or second induction BCG (>= 2 doses); both rounds of BCG must have been administered within a 12 month period; these patients must have either had high-grade Ta tumors and did not achieve a disease-free state for more than 6 months following last dose of BCG, or they had CIS and did not achieve a CR; S1605 registration must occur within 9 months of the last dose of BCG
• If a patient does not meet these criteria only because the last dose of BCG was more than 9 months ago, the patient may become eligible if he/she shows histologically proven high-grade recurrence after an additional round of induction or maintenance BCG (>= 3 doses) within 9 months prior to registration
• Patient has persistent or recurrent high grade T1 urothelial carcinoma after completing therapy with at least induction BCG (>= 5 doses); patients with recurrent high grade T1 urothelial carcinoma after additional rounds of BCG will also be eligible, but one round of maintenance therapy or a second induction is not a pre-requisite for these patients. Trial registration must occur