title: Alteration of colonic mucin after ureterosigmoidostomy.
abstract: OBJECTIVE
  Patients undergoing urinary diversion by ureterosigmoidostomy after complete cystectomy for malignant bladder tumors show a high incidence of neoplasia at and near the site of anastomosis. We examined a risk factor for tumor occurrence in the area of anastomosis, alterations of mucus glycoproteins in the surrounding colonic mucosa.
  
  
  METHODS
  Colonoscopy was performed in 37 patients who had undergone ureterosigmoidostomy. Biopsy specimens were obtained near the ureteral anastomosis and were stained with hematoxylin and eosin, high iron-diamine alcian blue (pH 2.5), and a fluorescent lectin conjugate (peanut agglutinin).
  
  
  RESULTS
  At the anastomotic site colonoscopy showed protruding lesions in 26 of 37 patients (71 percent), all histologically representing inflammatory granulomas. The mucosa around the anastomosis was normal in endoscopic appearance; however, histologically, slight inflammatory cell infiltration, edema, and increased numbers of Paneth cells were observed. Alcian blue staining revealed an increase in mucosal sialomucin postoperatively compared with preoperatively. The proportion of peanut agglutinin-binding mucin, not observed in normal mucosa but seen in malignant or premalignant tissue, was increased.
  
  
  CONCLUSIONS
  As postoperative interval increases, changes in properties of the "background" mucosa become greater, which suggests an association with colonic carcinogenesis.
authors.affiliation: Second Department of Internal Medicine, Osaka Medical College, Takatsuki City, Japan.
authors.forename: C
authors.initials: C
authors.lastname: Shimamoto
authors.forename: I
authors.initials: I
authors.lastname: Hirata
authors.forename: Y
authors.initials: Y
authors.lastname: Takao
authors.forename: H
authors.initials: H
authors.lastname: Takiuchi
authors.forename: H
authors.initials: H
authors.lastname: Morikawa
authors.forename: Y
authors.initials: Y
authors.lastname: Nakagawa
authors.forename: K
authors.initials: K
authors.lastname: Katsu
mesh_terms: D000328:Adult; D000368:Aged; D000714:Anastomosis, Surgical; D002471:Cell Transformation, Neoplastic; D012809:Colon, Sigmoid / Q000601:surgery; D003110:Colonic Neoplasms / Q000209:etiology* / Q000473:pathology; D003113:Colonoscopy; D015653:Cystectomy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009077:Mucins / Q000737:chemistry*; D012307:Risk Factors; D014519:Ureterostomy; D001749:Urinary Bladder Neoplasms / Q000473:pathology / Q000601:surgery*; D014547:Urinary Diversion / Q000009:adverse effects*
chemical_list: D009077:Mucins