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  • Title: Linear mucosal defect may be characteristic of lansoprazole-associated collagenous colitis.
    Author: Umeno J, Matsumoto T, Nakamura S, Jo Y, Yada S, Hirakawa K, Yoshimura R, Yamagata H, Kudo T, Hirano A, Gushima M, Yao T, Nakashima Y, Iida M.
    Journal: Gastrointest Endosc; 2008 Jun; 67(7):1185-91. PubMed ID: 18513560.
    Abstract:
    BACKGROUND: Although some cases of collagenous colitis have been induced by lansoprazole (LPZ), the clinicopathologic features of LPZ-associated collagenous colitis have not been elucidated. OBJECTIVE: To elucidate the clinical, endoscopic, and histopathologic features of LPZ-associated collagenous colitis. DESIGN: Retrospective case study. PATIENTS: The subjects were 13 patients with collagenous colitis diagnosed during a period from 2002 to 2007. MAIN OUTCOME MEASUREMENTS: The colonoscopic and histopathologic findings were compared retrospectively between 9 cases of LPZ use (LPZ group) and 4 cases without the use of LPZ (non-LPZ group). RESULTS: A colonoscopy revealed a linear mucosal defect more frequently in the LPZ group (7 of 9 cases [78%]) than in the non-LPZ group (0 of 4 cases [0%], P = .02). Friable mucosa was also noted in 4 patients (44%) in the LPZ group but none in the non-LPZ group. The colonoscopic finding in the non-LPZ group was either normal mucosa or nonspecific minimal abnormalities, whereas patients in the LPZ group had either a linear mucosal defect, mucosal bleeding, or both (P = .001). On histologic examination, the subepithelial collagen band was thicker in patients in the LPZ group than in those in the non-LPZ group (median 45 vs 26.3 mum). All patients in the LPZ group recovered from diarrhea after discontinuance of LPZ. LIMITATION: A small number of patients. CONCLUSIONS: Linear mucosal defects and friable mucosa may be characteristic colonoscopic findings in cases of LPZ-associated collagenous colitis.
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