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消化管出血例においては,出血部位の確定,質的診断の確立が重要であるが,バリウム造影検査,内視鏡検査など通常の検査法では診断できないものも多い.選択的動脈造影法は従来の検査法では発見できなかった病変の発見に有効であり,本法によっていくつかの疾患が診断可能となってきた.そのうちの1つとして,1960年Marguilisら1)が動脈造影によって最初の消化管の動静脈形成異常(Arteriovenous malformation)を報告しているが,以来この疾患の重要性が注目されてきている.われわれは最近選択的動脈造影ではじめて診断でき,手術で治癒せしめた,きわめて微小な空腸壁の動静脈形成異常の1症例を経験したので,若干の考察を加えて報告する.
症 例
患 者:50歳 女性
主 訴:下血,左上腹部痛
既往歴:46歳の時,虫垂切除術を受けた
家族歴:特記すべきことなし
A 47-year-old woman was admitted to Jichi Medical School Hospital on August 2, 1974, with tarry stools. Radiographic and endoscopic examinations failed to detect the bleeding site in the gastrointestinal tract and she was discharged. The patient was readmitted to the hospital in preshock with tarry stools on July 12, 1977. She recovered from the shock after receiving 2,000 ml blood transfusion. Selective superior mesenteric arteriogram revealed a spot of contrast medium in the jejunum, which was thought to be compatible with arteriovenous malformation of the jejunum. On emergency operation, a pulsating tumor in 6×3 mm size was found in the jejunal wall about 80 cm distal to the ligament of Treitz. Intraoperative endoscopic examination showed a submucosal tumor with coagula at its apex. The tumor was removed and examined histologically. The tumor consisted of irregularly dilated thick-walled vessel and small arteries. Arteriovenous malformation of the jejunal wall was confirmed.
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