Giant Brunner's gland hyperplasia of the duodenum successfully resected en bloc by endoscopic mucosal resection: A case report

Figure 5 Endoscopic mucosal resection of the lesion. A: After injection of hypertonic saline epinephrine solution at the base of the lesion, we grasped it with a snare. We attempted to excise the lesion using the cutting mode of the high-frequency generator. There was no electrical activation the first time. After relocating the constriction site with the snare slightly away from the base, we achieved satisfactory electrical conduction, and the lesion was excised entirely; B: There was no macroscopic residual tumor on the ulcerated surface after excising the lesion, and there were no muscle layer injuries or perforations; C: The ulceration after excision was completely closed using endoclips.