En bloc resection of large gastric submucosal tumor with endoscopic submucosal dissection

摘要

A 60-year-old man presented with years of intermittent, postprandial epigastric fullness. Upper endoscopy revealed a large, broad-based, protruding mass located along the anterior wall of the antrum (A). Abdominal CT suggested that the mass originated in the submucosal layer and demonstrated uniform fat density within the mass. Endoscopic submucosal dissection (ESD) was performed by using a Dual knife (KD-650Q; Olympus, Tokyo, Japan). The tumor was resected, and the mucosal defect was exposed, revealing the underlying muscular layer (B, C). The resected tumor measured 6.0 x 4.0 cm (D) and histologically proved to be a well-differentiated adipose tumor (lipoma) covered by a fibrous capsule. The patient recovered uneventfully and 2 months after ESD remained free of complaints.