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Case 1 underwent endoscopic full-thickness resection for a gastric mesenchymal tumor in the fundus. (a) A bump was seen in the fundus (endoscopic ultrasound showed that it originated from the muscular layer and grew extraluminally, 2.0 cm in diameter). (b) The post-ESD wound has no defect left. A perforation was observed. (c) The wound was large and closed with titanium clips. (d) The mass, 2.0 cm in diameter.
