Such an important subject as urinary diversion is unlikely to remain unchanged and unchallenged for long. The problem is to determine when is an appropriate time to examine current clinical practice of this major urological procedure. Historically, urinary diversion began with attempts to resolve the distressing problems associated with ectopia vesicae; later, urinary diversion was extended to help those patients with neurological problems of bladder function and with malignant diseases of the lower urinary tract. A significant landmark in the development and use of these procedures came with...