Figure 10. Extraperitoneal bladder injury in a 58-year-old man who had undergone radical retropubic prostatectomy and bilateral pelvic lymph node dissection. Continuous high outputs from the surgical drains were seen postoperatively. CT cystogram demonstrates extraperitoneal urine and contrast material leakage into the prevesical space of Retzius (arrows). The patient was successfully treated conservatively with a transurethral bladder catheter.