[Mirizzi's syndrome--diagnosed preoperatively by MR scanning]

A case of Mirizzi's syndrome in a 30-year-old woman diagnosed preoperatively by MR-scanning is presented. The MR-scanning showed an impacted stone in the gallbladder neck and surrounding soft-tissue mass compressing the hepatic duct causing a narrow stricture of the duct. There were moderate dilatation of the intrahepatic bile ducts as well as gallbladder stones but the common duct was normal. The findings were consistent with Mirizzi's syndrome, which was confirmed by surgery. Awareness of Mirizzi's syndrome because of its potential complications and MR-scanning as a potential diagnostic tool is advocated.