Endoscopic Cryoablation Combined With PD-1 in Advanced Gastric Cancer

"ECAT: A cryoballoon with catheter is inserted along the endoscopic forceps channel, the balloon is placed on the surface of the tumor, and the balloon is dilated so that it fits snugly over the lesion. The freezing cycle is initiated and continued for 2-3 minutes, and then the balloon is rewarmed and frozen again for 2-3 minutes; the freeze-rewarm cycle is repeated twice.~PD-1:The first PD-1 monoclonal antibody treatment in this study was given within 3 days before and after ECAT treatment, and subsequent treatment was given every three weeks according to the instructions."