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OBJECTIVES To present our preliminary experience of robotic left radical nephrectomy (LRN) and segmental inferior vena cava (IVC) resection without caval replacement for left renal cell carcinoma (RCC) with inferior vena cava tumor thrombus (IVCTT). MATERIALS AND METHODS Between 2017 and 2018, seven patients underwent segmental IVC resection and LRN robotically. All patients underwent preoperative cavography, demonstrating complete IVC occlusion. Computed tomography-based three-dimensional reconstruction revealed sufficient collaterali