[Urologic complications od chronic inflammatory intestinal diseases]

The three most common inflammatory diseases of the bowel, colonic diverticulitis, regional enteritis and ulcerative colitis, involve the bladder or ureter in the advanced stage in about 10%. The colovesical fistula is found more frequently with diverticulitis and less often with regional enteritis, which penetrates predominantly from the ileum into the bladder. On the other hand, if an ureteric stenosis develops, it will be caused on the right side mainly by regional enteritis and on the other side by ulcerative colitis. The vesicointestinal fistulae will close without sequelae after resection of the involved bowel segment. However, the ureteric stenosis will often be followed by nephrectomy despite bowel resection and ureterolysis, if the operation is not undertaken early enough. Frequent rechecks with infusion urography should help to prevent this. Nephrolithiasis, amyloidosis, and a contracted bladder are futher, yet less common complications of chronic inflammatory disease of the bowel.