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Abdominal enhanced computed tomography images. A: A middle line retroperitoneal neoplasm with the inferior vena cava, right renal vessels, and abdominal aorta traversing in it (before chemotherapy); B: The tumor shrank considerably, but the above-mentioned vessels were still encased by the tumor (preoperatively after chemotherapy); C: Clearance of the tumor around the vessels (postoperative changes).
