Abstract
A case of severe hepatitis presenting potato liver on peritoneoscopy was reported. A 21-year-old male developed jaundice and hyperammonemia. Intensive parenteral administration of prednisolone and THE combined with oral lactulose brought about a recovery, and subsequently he was submitted to peritoneoscopy on the 105th hospital day. Both liver lobes showed typical potato liver according to the H. Kalk's classification. A typical potato liver is rare, and the pathogenesis of potato liver was discussed.