肝胆膵領域のまれな感染症：画像診断のポイント

Rare infections of the hepato-biliary-pancreatic region

肝胆膵領域の感染症は，肝膿瘍，胆管炎など，主に細菌が原因である感染症によるものが多い。いずれも抗生物質による治療が標準であり，施設ごとに標準化された手順が存在する。しかし，これらの一般的な細菌以外の肝胆膵領域の感染症もまれではあるが存在する。本稿では，肝胆膵領域のまれな感染症として，アメーバ肝膿瘍，肝包虫症，肝蛭症，肝吸虫症，住血吸虫症，ジアルジア症の画像診断のポイントを解説する。

Common infections of the hepato-biliary-pancreatic region, such as liver abscess and cholangitis are mainly caused by bacteria. Treatment with antibiotics is the standard therapy. However, there are also rare infections of the hepato-biliary-pancreatic region which cannot be treated with antibiotics. Rare infections include amoebic liver abscess, echinococcosis, fascioliasis, clonorchiasis, opisthorchis, schistosomiasis, and giardiasis. Amoebic liver abscess, echinococcosis, and fascioliasis makes lesions in the liver. Fascioliasis, clonorchiasis, and opisthorchis causes the abnormalities in the biliary system. Clonorchiasis and giardiasis has been reported to pancreatic lesion. This paper describes the outlines focused on the imaging of the rare infections in the hepato-biliary-pancreatic region.