Bouveret¿s syndrome: A rare cause of gastric outlet obstruction by an impacted gallstone via a cholecystoduodenal fistula M. Nagahama; T. Chibana; A. Hokama;

Sister Mary Joseph¿s nodule: Umbilical cutaneous metastasis as initial presentation of sigmoid adenocarcinoma A. Hokama;

Spontaneous passage of an impacted gallstone at the ampulla of Vater: ¿Laying-an-egg¿ sign A. Hokama;