The clinical manifestations and staging of kidney cancer are related to the most common early-stage kidney cancer, late-stage kidney cancer, or metastatic kidney cancer. Generally, early-stage kidney cancer exhibits few clinical symptoms and is often detected during physical examinations, through ultrasonography of the urinary tract, or kidney ultrasonography, where tumors are the most commonly found. Additionally, later stages of kidney cancer often present as swelling pain in the waist area or occasional hematuria. More serious conditions involve feeling a mass in the upper abdomen upon palpation, which is a clinical manifestation. Nowadays, with heightened awareness for health checks, such conditions are generally discovered through these examinations. When major clinical manifestations like hematuria and abdominal masses occur, it indicates that the kidney tumor has already progressed to the mid or late stages.