Patients with ureterosigmoidostomy have a 100 times greater chance of developing carcinoma of the colon after living with the modification for a number of years, on average 20 30 years after the operation, which can also lead to severe surgical adhesions.
2.
Examples are midline internal sphincterotomy ( 8 % risk ), lateral internal sphincterotomy, fistulectomy, fistulotomy ( 18-52 % ), hemorrhoidectomy ( 33 % ), ileo-anal reservoir reconstruction, Lower anterior resection, total abdominal colectomy, ureterosigmoidostomy, Some authors consider obstetric trauma to be the most common cause.