Endoscopic transgastric drainage of a gastric wall abscess after endoscopic submucosal dissection

Figure 2 Abdominal computed tomography and magnetic resonance imaging findings. A: Abdominal computed tomography (CT) revealed a portion of the thickened gastric wall and a small amount of ascites and free air around the stomach. Free air is indicated by the arrow; B: Abdominal T2-weighted magnetic resonance imaging showed a moderately high-intensity tumor with niveau formation, 5 cm in size, located in the posterior wall of the fundus of the stomach, which suggested focal abscess formation. The abscess is indicated by the arrowhead.