臨牀消化器内科 Vol.34 No.5(2-2)


特集名 肝と免疫2019
題名 自己免疫性肝炎 (2) 自己免疫性肝不全の実態
発刊年月 2019年 05月
著者 持田 智 埼玉医科大学消化器内科・肝臓内科
【 要旨 】 自己免疫性肝炎は慢性肝疾患として経過して,ACLF(acute‒on‒chronic liver failure)ないしchronic decompensationとして肝不全に陥る場合がある.しかし,このタイプの肝不全は,慢性肝疾患の成因を正確に診断し,副腎皮質ステロイドを導入することで予防可能である.臨床的に問題となるのは急性発症型の自己免疫性肝炎である.また,厚生労働省の全国調査では,自己免疫性の急性肝不全と遅発性肝不全(LOHF)が増加傾向にあり,昏睡型の症例はとくに予後不良であることが判明している.自己免疫性の症例は薬物性ないし成因不明例との鑑別が困難であるが,適切に診断して早期に副腎皮質ステロイドの大量静脈投与を行えば,予後の向上が期待できる.
Theme Liver and Immunology 2019
Title Liver Failure Due to Autoimmune Hepatitis in Japan
Author Satoshi Mochida Department of Gastroenterology & Hepatology, Saitama Medical University
[ Summary ] Although ACLF (acute‒on‒chronic liver failure) and/or chronic decompensation may develop in patients with chronic liver diseases due to autoimmune hepatitis, such liver failure can be prevented through glucocorticoids therapy following an exact diagnosis. Thus, acute‒onset autoimmune hepatitis is a crucial problem that should be resolved to improve the outcome of patients with autoimmune hepatitis. The study group sponsored by the Ministry of Health, Labor and Welfare revealed that patients with acute liver failure and LOHF (late‒onset‒hepatic failure) have been increasing in number year by year, and the outcome of patients was unfavorable especially in those manifesting hepatic coma. Patients with acute liver failure due to autoimmune hepatitis showed clinical features almost similar to those in patients with drug allergy‒induced liver disease and those with indeterminate etiology. Immediate intravenous administration of high‒dose glucocorticoids is required to rescue such patients following exact diagnosis.
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