Do you have what it takes for challenging endoscopic submucosal dissection cases?

Figure 1 Lesion at the cardia, just below the gastroesophageal junction. A: Retroflexed view of the cardia; B: A circumferential incision was made from the oral to the anal side, which is then vulnerable to bleeding; C: Submucosal dissection from the anal to the oral side; D: The lesion was completely resected.