Ureterosigmoidostomy is surgery that creates a new way for urine to pass out of the body. This may be needed if the bladder has been removed due to problems, such as bladder cancer.
During the surgery, the tubes (called ureters) that carry urine from the kidneys to the bladder are detached from the bladder. They are then attached to part of the colon. This lets both urine and stool flow through the colon and leave the body through the anus.