Abstract
A routine medical checkup revealed a very large hepatic cyst in a 52-year-old woman, who was referred to our hospital for epigastric discomfort. Contrast-enhanced CT showed a cystic lesion within the right lobe of the liver. It was 18 cm in diameter, with sharply defined margins and smooth, thin walls. In an MRI, the cystic lesion was homogeneously hypointense on T1-weighted imaging and homogeneously hyperintense on T2-weighted imaging. The communication between the cyst and the biliary tree could not be identified. Laparoscopic deroofing was performed after diagnosis of a symptomatic simple hepatic cyst. During this maneuver, a connection between the hepatic cyst and the biliary tree was found. The lesion was closed by laparoscopic suturing. We reported a rare case of hepatic cyst with biliary communication that was successfully treated by laparoscopic surgery.