Endoscopic resection techniques for colorectal neoplasia: Current developments

Figure 1 Cold snare resection. A: Endoscopic appearance of a small polyp in the sigmoid colon. B: Positioning of a specifically dedicated snare for cold snare resection. C: Appearance of the resection field with mild bleeding. D: Histopathology showing tubular adenoma (hematoxylin/eosine, magnification: 80-fold).

Figure 2 Endoscopic submucosal dissection. A: Endoscopic aspect of a large sessile lesion (Paris 0-Is/0-IIa; lateral spreading tumor, granular type) in the cecum. B: Start of endoscopic submucosal dissection at the proximal site. C: Mucosal incision at the distal margin. D: Completed resection with resection bed in the cecum. E: Resected specimen on corkboard. F: Histopathology: tubulovillous adenoma with focal high-grade intraepithelial neoplasia (hematoxylin/eosine, magnification: 80-fold).

Figure 3 Endoscopic full-thickness resection with the full thickness resection device. A: Endoscopic aspect of a recurrence after piecemeal endoscopic mucosal resection in the ascending colon. B: The lesion is marked and retracted into the resection cap using a grasping forceps. C: Resection bed with over the scope clip in situ. Note the periluminal fat within the clip. D: Resected specimen on corkboard. E: Histopathology: full-thickness resection specimen with tubulovillous adenoma/low-grade intraepithelial neoplasia (hematoxylin/eosine, magnification 80-fold).