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TAMIS (Transanal minimally invasive surgery) procedure. (A) The GelPOINT® Path is inserted though the anus. Three accessory ports are attached to the GelPOINT® Path, and the usual laparoscopic instruments are used. (B) A wet gauze is inserted in the oral side of the tumor to prevent the spread of CO2 along the colon. (C) An endoscopic grasper and vessel-sealing device are used to facilitate a full-thickness excision. (D) The rectal wall defect is left open, and is not closed.
