Delayed perforation after endoscopic submucosal dissection for early gastric cancer: Clinical features and treatment

Figure 3 Muscular layer had become necrotic. A: The surgically resected specimen. Although no distinct site of perforation was found in the surgically resected specimen, the ulcer floor had become thin after endoscopic submucosal dissection (circled); B: The histopathological specimen stained with hematoxylin and eosin. At the ulcer floor, the muscular layer was exposed, and all layers had become necrotic.