Fig. 1

Endoscopy and computed tomography (CT) findings. a Endoscopy at the patient’s initial visit reveals a mass measuring 2.5 × 3.0 cm at the junction of the lesser curvature and gastric antrum. The mass has uneven surface mucosa and a base covered with a coating, with hard and brittle tissue that bleeds easily. b Enhanced CT of the upper abdomen shows limited thickening of the gastric wall in the gastric antrum and enlarged perigastric lymph nodes. c and d Endoscopy at 2 months after chemotherapy shows that the mass at the junction of the lesser curvature and gastric antrum is unchanged. It is of the same size (2.5 × 3.0 cm), and shows a central ulcer and a base covered with a coating, with hard and brittle tissue that bleeds easily