Early stage kidney cancer patients still have the possibility of metastasis after surgical resection Kidney cancer is a collective term for malignant tumors occurring in the kidney, including primary kidney cancer and secondary kidney cancer. Primary renal cancer is the most common malignant tumor originated from renal tubular epithelial system, among which clear cell carcinoma accounts for the majority, accounting for about 85% of renal malignant tumors. One study reported that 65% of patients with renal cancer had limited lesions, while 16% had metastases. The incidence of organs with metastasis was 48 .4% for lung metastasis, 23.2% for bone metastasis, 12.9% for liver metastasis, 5.2% for adrenal metastasis, 1.9% for skin metastasis, 1.3% for brain metastasis, and 7.10% for other sites in that order. The biological characteristics of malignant tumors are invasiveness and metastasis. For early clear cell renal carcinoma, if it is given active surgical treatment, the possibility of recurrence is small; if the disease has progressed or metastasized, the possibility of recurrence is larger. Even for early-stage renal cancer, recurrence/metastasis is still possible after surgery, and recurrence and metastasis often occur within 1 to 2 years after surgery, and most of them occur within 5 years after surgery, with an incidence rate of 20% to 30%. In addition, among the new cases, 20% of patients have already developed distant metastasis at the time of diagnosis. If kidney cancer with metastasis is suspected or diagnosed, it is recommended to go to regular hospitals for comprehensive evaluation of the condition, follow the doctor’s instructions to cooperate with the treatment, and choose the appropriate treatment plan to improve the patient’s prognosis, so as to avoid delaying the condition.