To evaluate the smooth muscle-collagen fibers ratio in the bladder wall of castrated male wistar rats.Material & method: Sixteen wistar rats were equally assigned to castrated group (n = 8) and sham group (n = 8). All wistar rats were subjected to a one-week acclimatization period before undergoing treatment. After 60 days, cystectomy was performed in all rats in both groups and subsequent spec…