A 72-year-old woman who underwent Mile's operation for rectal cancer (t2n1M0 stage III a) 6 months ago, was pointed out solitary liver tumor located just below top of the diaphragm and was successfully treated by thoracoscopic microwave coagulation therapy (MCT). We thought three devices out for getting radical coagulation necrosis of the tumor during the operation as follows ; 1) Diaphragm incision by a ultrasonically activated device to observe the tumor directly, 2) Moving tumor in gentle manner using small bended gauze, 3) Placing MCT antenna vertically into the tumor using flexible MCT device. In these manners, we could recognize the tumor to be coagulated completely during the operation and enhanced CT scan also revealed tumor necrosis with sufficient surgical margin.
