In this study, we investigated the ability of UroVysion to assess response to intravesical therapy in patients with high risk superficial bladder tumors. Materials and
41 patients were identified in whom 47 cycles of induction and 41 cycles of maintenance intravesical therapy were given during the study period. This yielded a total of 88 treatment and evaluation cycles. Median follow-up was 9 months per induction (range 1-21 months) and 13 months per patient (range 1-25 months). A total of 133 urine samples were collected for UroVysion of which 40 were positive. Based upon standard clinical evaluation, 41 biopsies were performed which detected 20 recurrences. UroVysion testing performed immediately upon completion of therapy for the 41 patients undergoing biopsy yielded a sensitivity, specificity, and accuracy of 85 percent, 61 percent, and 71 percent.