Histochemical changes after ureterosigmoidostomies and colonic diversion

Area of Science:

• Urology
• Gastroenterology
• Oncology

Background:

• Colonic urinary diversions are surgical procedures that reroute urine flow through a segment of the colon.
• Morphological and histochemical changes in the colon following these diversions are of clinical interest due to potential long-term complications.

Purpose of the Study:

• To investigate the occurrence and significance of "transitional" mucosal changes in patients with colonic urinary diversions.
• To assess the value of these "transitional" changes in the follow-up of patients.

Main Methods:

• Study included forty patients with various colonic urinary diversions.
• Morphological and histochemical analyses were performed on colon biopsies using haematoxylin and eosin, and high iron diamine alcian blue stains.

Main Results:

• "Transitional" changes, indicative of a pre-malignant state, were found in 89% of ureterosigmoidostomies (at the ureteric orifice) and 44% distal to it.
• These changes were also present in 38% of past ureterosigmoidostomies and 100% of colon conduits.
• The earliest observed "transitional" change occurred one year post-diversion.

Conclusions:

• "Transitional" mucosal changes are common in patients with colonic urinary diversions.
• The low incidence of other morphological changes alongside these "transitional" findings suggests they have limited value for patient follow-up.