Abstract
A case of intrahepatic bile duct stone attributable to roundworm eggs is presented. The patient, a 41-year-old female, had undergone cholecystectomy at 36 years of age. Stones were not found during the surgery. The patient consulted our department with complaints of pain in the right upper quadrant, nausea and fever. Left intrahepatic bile duct stone was diagnosed, based on findings of a detail examination. Left lateral segmentectomy of the liver was carried out. The intrahepatic bile duct in the resected liver were dilated, thickened and filled with bile residue in which roundworms and their eggs were observed. In this case, stones were observed only in the left lateral segment of the liver, and the bile ducts were not narrowed. Round worms were found only sporadically in the left lateral segment. Bile was retained in the intrahepatic ducts at the lesion.
These findings strongly suggested the involvement of roundworms in the formation of intrahepatic bile duct stones.
