Fig. 1

Upper gastrointestinal endoscopic and gastrointestinal contrast examination findings. A pendulous tumor approximately 2.0 cm in diameter was found at the left wall of the middle thoracic esophagus (a). Long segment Barrett’s esophagus extending about 4.0 cm in length was observed at the anal side of the tumor (arrowhead) (b). Endoscopic ultrasonography showed the tumor infiltrating into the deep submucosal layer (white arrow) (c). Gastrointestinal contrast examination showed a defect image of 2.2 cm in the lower thoracic esophagus (double-ended black arrow) (d)