Currently, all malignancies tend to metastasize. Renal cancer is a common malignant tumor of the kidney in the urinary system. Generally, patients might not exhibit any symptoms in the early stages. The most common symptoms are usually back pain and hematuria, and some patients are diagnosed due to an abdominal mass. The primary treatment for renal cancer is surgical intervention, which is considered the preferred method and is believed to be potentially curative. For patients with stage I, II, III, and IV renal cancer, the survival rates decrease progressively. Patients with stage I and II renal cancer should have follow-ups every three to six months for three consecutive years after surgery, and then annually. Patients with stage III and IV renal cancer should have follow-ups every three months for two years post-treatment, then monthly in the third year, and annually thereafter. Early detection of metastasis is crucial for timely treatment. Therefore, even after nephrectomy, renal cancer might recur, and regular follow-ups are essential.