Bloc biopsy by using submucosal endoscopy with a mucosal flap method for gastric subepithelial tumor tissue sampling (with video)

摘要

Subepithelial tumors (SETs) include widely malignant tumors such as GI stromal tumors, malignant lymphomas, carcinoid tumors, gastric cancers similar to SETs, and benign tumors such as leiomyomas, aberrant pancreas, and lipomas. Currently, minimally invasive local resection techniques such as hybrid natural orifice transluminal en-doscopic surgery (NOTES), which consists of endoscopic full-thickness gastric resection, have been developed for the treatment of GI stromal tumors.1 However, there is no consensus regarding the optimal strategy for the tissue diagnosis of SETs before determining the plans for further management such as surgical resection or observation. SET differentiation is essentially important, because different types of lesions may need different management, prognoses, and therapeutic options.