Why Do Prostate Cancer Treatments Cause Urinary Incontinence?
It helps to know a bit about how the bladder holds urine. When urine is emptied into the bladder from the kidneys, it is stored inside the bladder until you have the urge to urinate. The bladder is a hollow, muscular, balloon-shaped organ. Urine flows out of the bladder, and leaves the body through a tube called the urethra. Urination happens when the muscles in the wall of the bladder contract, forcing urine out of the bladder. At the same time, muscles that surround the urethra relax and allow the flow of urine. The prostate gland surrounds the urethra. Because enlarged prostate glands can obstruct the urethra, a man with an enlarged prostate can have urination retention or other problems with urination. Removing the prostate through surgery or destroying it through radiation (either with an external beam or with radioactive seed implants) disrupts the way the bladder holds urine and can result in urine leakage. Radiation can decrease the capacity of the bladder and cause spasms that
