Treatment outcome and prognostic variables for local control and survival in patients receiving radical radiotherapy for urinary bladder cancer.

The aim of this retrospective study was to analyze the outcome of radical radiotherapy in 292 patients with bladder cancer and to identify prognostic factors for local control and survival. Median age was 72.3 years (range 45-83 years). Median follow up was 66 months (range 18-121 months). All patients were treated by use of a standard 3-field technique with 60 Gy in 30 fractions to the tumor and the bladder. The elective lymph nodes were treated with doses in the range from 46 Gy to 60 Gy. Complete response was obtained in 52% of the patients at 3-month control. However, 41% of all patients with an initial CR developed recurrence during follow-up. The 3-year and 5-year overall survival rate was 31% and 21%, respectively. Performance status, T-stage, macroscopic complete TURB, hydronephrosis, and serum creatinine were independent prognostic factors for overall survival and, thus, important for the selection of patients for curative intended radiotherapy. During radiotherapy acute transient side effects were recorded in 78% of the patients; severe bowel complications were recorded in 9 patients (3%). Following radiotherapy, 10 patients (3%) developed intestinal reactions requiring surgery. Three patients (1%) were cystectomized because of severe radiation reactions in the bladder. At 5-year follow-up, the actuarial risk of complications requiring surgery was 15%. Treatment-related mortality was 2%.