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Mucosal morphological changes in the ileal neobladder

Y Kojima1, H Asaka, Y Ando

  • 1Department of Urology, Nagoya City Higashi General Hospital, Japan.

British Journal of Urology
|August 12, 1998
PubMed
Summary

Intestinal segments used for neobladders show ultrastructural changes, including reduced villi and microvilli, suggesting altered function. However, the ileal mucosa adapts to urine retention over time.

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Area of Science:

  • Urology
  • Gastroenterology
  • Cell Biology

Background:

  • Radical cystectomy often necessitates urinary diversion using intestinal segments.
  • Ileal neobladders are a common form of urinary reconstruction.
  • Understanding mucosal changes is crucial for long-term neobladder function.

Purpose of the Study:

  • To investigate the ultrastructural alterations in the intestinal mucosa used for neobladder construction.
  • To assess the adaptive changes in ileal mucosa following radical cystectomy and neobladder formation.

Main Methods:

  • Biopsy specimens from eight male patients' ileal neobladders were analyzed.
  • Light and electron microscopy were employed to examine mucosal morphology.
  • Comparison was made with control specimens from patients undergoing neobladder construction.

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Main Results:

  • Ileal neobladders exhibited shorter villi, fewer goblet cells, and marked edema.
  • Electron microscopy revealed reduced microvilli and filamentous core rootlets.
  • Irregular cell borders and increased desmosomes were observed in the neobladder mucosa.

Conclusions:

  • The absorptive and secretory functions of the ileal mucosa are likely diminished.
  • Edema in the neobladder wall appears linked to inflammatory cell responses.
  • Ileal mucosa demonstrates adaptation to the urinary environment, including urine retention and mechanical stress.