Biliary cystadenoma is a rare cause of obstructive jaundice. We report
a case of a 78-year-old Japanese man with biliary cystadenoma present
ing repetitive abdominal pain and jaundice. Ultrasound sonography reve
aled a hyperechoic mass in the left lateral lobe of the liver. Histolo
gical examination revealed a biliary cystadenoma. Intracystic. hemorrh
age was assumed to be the cause of obstruction of the bile ducts.