臨牀消化器内科 Vol.28 No.11(6)


特集名 下部直腸・肛門部疾患の診断と治療
題名 宿便性潰瘍
発刊年月 2013年 10月
著者 清水 誠治 大阪鉄道病院消化器内科
著者 横溝 千尋 大阪鉄道病院消化器内科
著者 石田 哲士 大阪鉄道病院消化器内科
著者 森 敬弘 大阪鉄道病院消化器内科
著者 富岡 秀夫 大阪鉄道病院消化器内科
【 要旨 】 宿便性潰瘍は,高度の便秘によって形成された糞便塊が腸管粘膜を機械的に圧迫することにより生じる褥瘡潰瘍であり,血流低下が背景因子と考えられている.基礎疾患を有する高齢者に好発する.組織学的所見は非特異的であり,びらんから穿孔をきたすものまで程度はさまざまである.症状は高度の便秘後にみられる出血,腹痛であり,穿孔をきたすと急性腹症で発症する.直腸に好発するが,穿孔はS状結腸に多い.類円形ないし不整形潰瘍であり,歯状線近傍にはみられない点が急性出血性直腸潰瘍との鑑別点である.穿孔例では手術が必要である.非穿孔例では糞便塊の除去,絶食・輸液による腸管安静であり,出血には内視鏡的止血術が有効である.
Theme Diagnosis and Treatment of Anorectal Disease
Title Stercoral Ulcers
Author Seiji Shimizu Division of Gastroenterology and Hepatology, Osaka General Hospital of West Japan Railway Company
Author Chihiro Yokomizo Division of Gastroenterology and Hepatology, Osaka General Hospital of West Japan Railway Company
Author Tetsuji Ishida Division of Gastroenterology and Hepatology, Osaka General Hospital of West Japan Railway Company
Author Takahiro Mori Division of Gastroenterology and Hepatology, Osaka General Hospital of West Japan Railway Company
Author Hideo Tomioka Division of Gastroenterology and Hepatology, Osaka General Hospital of West Japan Railway Company
[ Summary ] Stercoral ulcers are regarded as being"decubitus" ulcers caused by direct compression of the colorectal mucosa by impacted fecal masses. Reduced blood perfusion is considered to be implicated as a causative factor. This disorder tends to occur in older subjects with various underlying diseases. The histological findings are nonspecific, and the depth varies from erosion to perforation. The symptoms are hematochesia and/or abdominal pain following severe constipation. Acute abdomen develops in cases with perforations. Cases often involve the rectum, but the sigmoid colon is the most common site of perforations. Ulcers are round to irregularly shaped and do not occur in the vicinity of the dentate line. These features are distinct from those of acute hemorrhagic rectal ulcers. Surgery is necessary in cases where perforation has occured. Nonperforated cases are treated by removal of fecal masses and bowel rest. Endoscopic hemostasis is useful to control bleeding.
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