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Computed tomography scans showing partial response in primary tumor of metastatic renal cell carcinoma in patient treated with nivolumab; 48-year-old patient with low-volume but poorly differentiated disease who developed progressive disease after sunitinib, sorafenib, and thoracic surgery achieved partial response in primary tumor (indicated by arrows) after treatment with nivolumab 1 mg/kg. Treatment was held after three cycles, and response continued for 3 years after therapy.
