Complications of advanced stage of kidney cancer mainly include lumbar pain, hematuria and mass, etc. The appearance of advanced stage complications not only increases the pain of patients, but also increases the difficulty of treatment. 1. Lumbago: In the advanced stage of kidney cancer, the growing mass, swelling of renal peritoneum and invasion of tumor into surrounding tissues and organs may cause the symptom of dull pain in the waist. 2. Hematuria: besides lumbago, painless hematuria often occurs intermittently in the advanced stage of kidney cancer, and sometimes solid blood clots may appear, but the degree of hematuria is not related to the volume of kidney cancer in general. 3. Lump: As the location of kidney is relatively hidden, early kidney cancer is usually hard to be touched, but when the tumor volume is large in advanced stage of kidney cancer, there may be the manifestation of abdominal or waist and back lumps.