Ligation-assisted endoscopic submucosal resection following unroofing technique for small esophageal subepithelial lesions originating from the muscularis propria

Figure 1 Ligation-assisted endoscopic submucosal resection after unroofing technique. A: Marking dots around the lesion by snare; B: Unroofing the apical mucosa around the marking dots by snare; C: Aspiring the lesion and ligating the lesions fully with endoloop; D: Cold snaring the lesion above the endoloop; E: Ligating the defect using another endoloop; F: Resected specimen; G: Microscopic appearance with hematoxylin-eosin staining of leiomyoma ( × 200); H: Microscopic appearance with hematoxylin-eosin staining of gastrointestinal stromal tumor ( × 200).