What are the early symptoms of kidney cancer?

The early symptoms of kidney cancer mainly include the following: 1. Hematuria: Painless, intermittent hematuria is a notable early symptom of kidney cancer, present in about 60% of patients. The blood in the urine may appear bright red or dark red, and may come and go. 2. Pain: Patients may experience dull or aching pain in the flank area, with pain possibly radiating downward to the abdomen or thighs. This pain is typically caused by increased tension in the renal capsule due to tumor growth. 3. Mass: Some patients may feel a painless mass in the flank or abdominal area, which usually indicates that the tumor has grown to a considerable size. 4. General symptoms: Such as weight loss and fatigue, which may be related to energy consumption by the tumor or effects on appetite. 5. Other symptoms: A small number of patients may also experience symptoms such as fever, anemia, and hypertension. The above symptoms are not unique to kidney cancer. If similar symptoms appear, it is recommended to seek timely medical attention for further examination.