Fig. 4

Picture of the resected specimen. a The arrow shows the orifice of the ectopic bile duct opening in the lesser curvature of the stomach. The dotted circles show the main tumor lesions. The circle indicates food scraps present in the ectopic bile duct. b Arrows indicate tumor lesions. The main tumor (1.5 cm × 1.5 cm) was located 6 cm on the anal side of the oral transection side. A lesion (1.0 cm × 1.0 cm) that could not be diagnosed on preoperative examination was found, located 0.5 cm oral side from the anal transection side