Spontaneous passage of a large common bile duct stone during computed tomography

An asymptomatic 85-year-old man was referred to our hospital for the treatment of a common bile duct (CBD) stone. He had a history of distal gastrectomy and Roux-en-Y reconstruction for gastric cancer. Endoscopic retrograde cholangiopancreatography (ERCP) with a single-balloon enteroscope was performed. The cholangiogram revealed a CBD stone measuring 15mm in diameter (Fig. 1); however, stone extraction failed because of unsuccessful biliary cannulation. Precut sphincterotomy was not performed in this session, and therefore his papilla remained naive.

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