Pathological Complete Response to Nivolumab Plus Ipilimumab Combination Therapy in Advanced Renal Cell Carcinoma With Inferior Vena Cava Tumor Thrombus. - Tsuchiya T; Kimura G; Takeda H; Akatsuka J; Hasegawa H; Toyama Y; Sakatani T; Shimizu A; Ohashi R; Kondo Y (IJU case reports, 2026)