Most kidney cancer patients are discovered during health check-ups, and these patients may account for over 50%-60% of all kidney cancer cases. Among those with symptoms, the most common symptoms are lower back pain and blood in urine. A few patients also present with abdominal masses. 10%-40% of patients can exhibit paraneoplastic syndromes, manifested as high blood pressure, anemia, weight loss, cachexia, fever, abnormal liver function, hyperglycemia, increased erythrocyte sedimentation rate, and other changes. Additionally, symptoms such as bone pain, fractures, cough, and coughing blood can occur due to tumor metastasis.