granular cell carcinoma of kidney

例句：

1. 1. The patient's kidney function has significantly declined since the diagnosis.
   自从诊断出这个病以来，患者的肾功能已经显著下降。
2. 2. This type of cancer is rare but can be deadly if left untreated.
   这种癌症罕见，但如果不治疗可能会致命。
3. 3. The patient underwent surgery and is currently undergoing chemotherapy.
   患者接受了手术，目前正在接受化疗。