望月 環¹, 大内 博文², 平田 健一郎¹, 三谷 正信¹, 辰口 治樹¹, 福田 守道¹

Tamaki MOCHIZUKI¹, Hirofumi OHUCHI², Kenichiro HIRATA¹, Masanobu MITANI¹, Haruki TATSUGUCHI¹, Morimichi FUKUDA¹

¹札幌医科大学機器診断部, ²札幌医科大学第3内科

¹Department of Ultrasound and Medical Electronics, Sapporo Medical College Hospital, ²Third Department of Interna Medicine, Sapporo Medical College Hospital

キーワード : Agenesis of the right lobe of the liver, Retro hepatic gallbladder, 2D color Doppler , Magnetic resonance imaging

Congenital agenesis of the right lobe of the liver is a rare anomaly, and reported cases have been diagnosed mostly by invasive methods, such as angiography. Recent developments in non-invasive imaging modalities, ultrasound, X-ray CT and magnetic resonance imaging, has facilitated more simple and accurate diagnosis of anatomical anomalies such as partial organ agenesis. In this report, a case of agenesis of the right lobe of the liver can be identified with 2D color Doppler and MRI was described. A 58-year-old male with right hypochondralgia was first examined by ultrasound, which revealed a retro hepatic gallbladder. 2D color-flow Doppler disclosed a prominent left portal vein and the absence of the caudate lobe. Dynamic X-ray CT and MRI have clearly demonstrated the absence of the right lobe of the liver, and the right hepatic vein, together with the retro hepatic gallbladder. These discoveries confirm the suspected diagnosis of agenesis of the right hepatic lobe.