Hepatic peribiliary cysts diagnosed by magnetic resonance cholangiography.

We report a 76-year-old man with hepatic peribiliarycysts diagnosed by magnetic resonance cholangiopancreatography(MRCP). On his first admission, in 1991,the patient was misidentified as having localized dilatationof the left intrahepatic bile ducts, from the ultrasound(US) and computed tomographic (CT) findings,or primary sclerosing cholangitis from endoscopic retrogradecholangiopancreatography (ERCP). However,US and CT in 1998 suggested worsening of the lesions.MRCP was performed for the first time, revealing hepaticperibiliary cysts in the hepatic hilum and along theleft hepatic ducts. Drip infusion cholangiography(DIC)-CT confirmed the extraluminal compression of the bile ducts, caused by the cysts, without an influx ofcontrast medium into the hepatic peribiliary cysts. Retrospectiveevaluation showed increases in the size andnumber of the cysts in 1998 compared with the findingsin 1996. [ABSTRACT FROM AUTHOR]