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(a) Illustration of the surgical procedure for local resection. The wall around the tumour was cut, using the endoscopic nasobiliary drainage (ENBD) tube for guidance. The black line indicates the transection route along the tumour. (b) Intraoperative findings after tumour resection. The endoscopic nasobiliary drainage tube is converted to a percutaneous trans-small intestinal biliary drainage (PTID) tube (CBD, common bile duct).
