Carcinogenesis. The fate of intestinal segments used in urinary reconstruction.

Mucosal morphology and histochemistry of the continent cecal reservoir for urine.

Carcinogenesis and the use of intestinal segments in the urinary tract.

Mucosal ultrastructure of continent cecal reservoir for urine and its ileal nipple valve 2-9 years after construction.

Background: Intraductal ultrasonography of the bile/pancreatic duct using a thin-caliber ultrasonic probe (IDUS) provides excellent images of these ducts and the surrounding structures. Insertion of the device through the papilla of Vater is essential to carry out this examination. We developed a new probe with a ropeway system (XUM5RG-29R; Olympus, Tokyo) for transpapillary IDUS. Its usefulness such as ease of application and safety were prospectively evaluated.



Patients and methods: During the period of October 1997 to April 1998, transpapillary IDUS using the probe was performed in 194 patients at seven medical institutions. The success rates of insertion of the probe into the bile/pancreatic duct, observation of the area of interest, and the incidence of complications were evaluated.



Results: Passage of the probe through the papilla was successful without difficulty in all the patients. Successful introduction of the probe into the pancreatic duct, bile duct and both of the ducts was achieved in 98.4, 100 and 85% of the patients, respectively. Once the probe was introduced into the aimed duct, it was possible to obtain IDUS images of the area of interest in all but five patients. Mild acute pancreatitis developed in eight patients (4.1%), all of whom recovered with conservative therapy only.



Conclusions: It is possible to introduce the new ultrasonic probe into the desired duct once a guide wire has been inserted. This type of ultrasonic probe is quite useful when performing transpapillary IDUS of the bile and/or pancreatic duct.

Newly Developed Ultrasonic Probe With Ropeway System for Transpapillary Intraductal Ultrasonography of the Bilio–Pancreatic Ductal System

Colonoscopy with biopsy was included in the surveillance of 19 patients with ureterosigmoidostomy, because of the high incidence of colonic carcinoma reported in such cases. The patients were examined 1-6 times, at intervals of 1-2 years, 4-36 years after the urinary diversion. Random biopsies from the distal colon and rectum showed only discrete changes, and no dysplasia. Polyps with dysplastic changes were found close to ureteral anastomoses in three patients. For routine check-up of the rectosigmoid region and the ureteral implantation sites, examination with a flexible sigmoidoscope seems to be adequate and preferable, giving easy access to the risk zone for the development of cancer. Caution should be exercised, however, when performing biopsy close to the ureteral orifices.

Surveillance colonoscopy and biopsy in patients with ureterosigmoidostomy.

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Surveillance colonoscopy and biopsy in patients with ureterosigmoidostomy.