Occurrence of adenocarcinoma in the colon sigmoideum following Maydl's operation for urinary bladder exstrophy.

Two cases of colonic adenocarcinoma appearing 44 and 25 years, respectively, following an operation for urinary bladder exstrophy done according to Maydl are reported. A need for regular controls of patients with inner urine derivations has been emphasized. In the case of a suspected tumour it is necessary to alter the inner derivation to an outer one and also a resection of the colon at the site of the urinary bladder trigone is required. The Czech surgeon Karel Maydl was the first to implant the trigone of a splitted urinary bladder into the colon sigmoideum in 1892. This type of operation is used even today by several European urologists with excellent long-term results with respect to the preservation of an intact ureterovasical passage which prevents the reflux of the intestinal contents into the ureter, and also prevents the formation of strictures in the terminal parts of the ureter. In two patients who had been living for 25 and 44 years since they were operated on for urinary bladder exstrophy according to Maydl, a colonic adenocarcinoma was diagnosed. The tumour directly affected the implanted trigone wall and also involved the surrounding parts of the colon wall.