Task: Answer Verification
Input (English): Question: Is bladder biopsy of normal-appearing mucosa helpful in patients with unexplained positive cytology after nonmuscle invasive bladder cancer?
Answer: Patients with malignant cytology despite normal cystoscopy have a high recurrence rate. Biopsy of normal-appearing bladder mucosa in this setting is rarely positive and does not alter the recurrence pattern.
Output (English): no