Investigators want to observe the bleeding rate after endoscopic submucosal dissection for gastric tumors in the high-risk group of bleeding (the size of the iatrogenic ulcer is expected to be 40mm or more, or taking aspirin, antiplatelet drugs, and anticoagulants).~After resection and hemostasis with ESD, Fibrin glue (Greenplast Q™) is applied to the iatrogenic ulcer at the end of the procedure, and the control group will not be applied.~After that, observe whether there is a difference in the bleeding rate within 48 hours and 4 weeks.
It is a prospective randomized controlled study to look for effectiveness of fibrin glue to prevent bleeding in high-risk patients after endoscopic submucosal dissection in gastric neoplasm.