Abstract
A 68-year-old woman was admitted to our hospital because of confluence stone with abdominal pain. For lithotripsy, we found it difficult to use mechanical lithotriptors; therefore, we used extracorporeal and electrohydraulic shock wave lithotripsy. Following lithotripsy, peroral cholangioscopy was performed, which revealed a single polyp, discolored and hemispherical with a smooth surface, in the common bile duct. A biopsy specimen obtained from the polyp showed inflammatory granulomatous tissue, which confirmed the histological diagnosis of inflammatory polyp of the bile duct. One year post surgery, the patient is healthy and has shown no clinical symptoms of fever, jaundice, or any abdominal pain.
