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要旨 collagenous colitis 24例を対象とし,臨床像を遡及的に検討した.何らかの薬剤投与を受けていたのは24例中23例であり,最も頻度が高かったランソプラゾールは20例(83%)で投与されていた.ランソプラゾール内服例は,すべて内服中止のみで症状が改善した.ランソプラゾール内服例の11例(55%)に細長い縦走潰瘍が観察されたが,ランソプラゾール非内服例ではみられなかった(p=0.07).縦走潰瘍は左側結腸を中心に分布し,境界が明瞭で周囲の浮腫性変化に乏しかった.組織学的には,ランソプラゾール内服例で非内服例よりも膠原線維帯が厚い傾向がみられた(p=0.08).以上より,本邦ではランソプラゾールに関連したcollagenous colitisが比較的多く,その内視鏡所見として左側結腸の縦走潰瘍が特徴的である可能性が示唆された.
Although some cases of collagenous colitis(CC)have been induced by drugs such as nonsteroidal anti-inflammatory drugs(NSAIDs), aspirin and lansoprazole, the clinicopathological features of drug-induced CC have not been elucidated. To determine the clinical, endoscopic and histopathological features of drug-induced CC, we reviewed 24 subjects who were diagnosed with CC. All patients fulfilled the Giardiello's criteria for CC. 20 out of 24 patients(83.3%)were administered lansoprazole(LPZ)before onset of diarrhea(LPZ group). In all 20 patients in the LPZ group, diarrhea completely resolved after discontinuance of the medication. In comparison between the LPZ group and the non-LPZ group, colonoscopy revealed linear mucosal defect more frequently in the LPZ group(55%)than in the non-LPZ group(0%, p=0.07). The mucosal defects with a predilection for the left-sided colon were sharply demarcated and they were not accompanied by circumferential edema. In Japan, LPZ-associated CC may be most common among drug-induced CC and it seems to be often accompanied by linear mucosal defect.
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