A CASE OF SEPTUM FORMATION OF THE COMMON BILE DUCT

Abstract

The septum formation of the common bile duct was found in a 66-year-old female with choledocholithiasis. The patient was admitted to our hospital because of pain in the right hypochondrial region. Ultrasonogram showed a dilatation of the common bile duct (Figure 1). ERCP revealed a stone in the dilated common bile duct and a linear horizontal defect at its lower position (Figure 3). Postoperative choledochoscopy through T-tube showed a septum in the lower common bile duct (Figure 4). Histological evaluation on the septum by endoscopic biopsy revealed almost normal bile duct structure (Figure 5). The septum formation of the bile duct is a rare anomaly. Only 29 cases including the present case have been reported in the Japanese literature and were reviewed.