患者男，65岁。无痛性肉眼血尿，肾脏彩超示:左肾实质性占位，腹部CT示:左肾近皮质缘有一2cm*3cm大小低密度灶，强化不明显，向肾外突出，腹主动脉旁见一个软组织密度结节影。若患者行术前检查时发现右肺单发结节，下一步最佳的治疗方案是

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