Fig. 1

Images before chemotherapy. a Jejunal examination with an endoscope detected a circumferential hemorrhagic tumor in the upper jejunum. b Computed tomography revealed a tumor of the jejunum (arrow). c–e Multiple peritoneal metastases were observed spanning from the epigastric region down to the lower abdominal area (arrowheads). The larger peritoneal metastases were primarily located in the greater omentum (c, d). f An expandable metallic stent (Boston WallFlex^® Duodenal Stent 22 × 60 mm, arrowheads) was implanted and expanded