The majority of kidney tumors are malignant tumors, which we call renal cancer. Its subtype is most common in clear cell carcinoma, which is more common in men than women, about 2 to 4 times more common than women, and more common in patients over 40 years old. There are also a small number of benign malignant tumors. In recent years, kidney tumor patients are gradually getting younger, and with the popularization of medical checkups, the detection is getting earlier and earlier. When kidney tumor is found, how to choose the surgery method? Today I will talk about the related knowledge with you. 1.Does kidney tumor have any symptoms? Many patients want to know whether there are any typical symptoms of kidney tumor, so that they can compare the symptoms and detect kidney tumor earlier. Kidney cancer has the classic triad of “hematuria, back pain and abdominal mass”, but these symptoms are found in less than 20% of patients. (1) Hematuria occurs only when tumor tissues encroach into the renal calyces and pelvis. Typically, it is painless hematuria. When this happens, urinary tract tumor should be highly suspected. (2) As the tumor expands and grows, the kidney envelope will be under certain tension, and then the patient will feel a vague swelling pain at the back. (3) When the tumor is bigger, hard lumps can be felt in the back. When the above situations occur, it is necessary to go to hospital for detailed examination immediately to exclude the existence of kidney tumor. 2.How to detect kidney tumor in time? For the early detection of kidney tumor, it is simple and clear to do an abdominal ultrasound. Generally, for kidney tumor of 1cm or above, ultrasound can detect it. When once the occupying lesion is detected by ultrasound, it is extra important to do a kidney CT, which will be more accurate than ultrasound to diagnose kidney cancer. Of course, CTA and GFR will follow. CTA can help surgeons to clarify the blood supply of kidney and tumor before surgery, which is a great guidance for intraoperative operation; GFR can evaluate the kidney function of patients before surgery, which is a certain guidance for the preservation or retention of the affected kidney. In a kidney tumor case we operated, the tumor was 6 cm in diameter, accounting for one-half of the whole kidney volume, and the location was deep, which made the operation more difficult. Some benign renal malformation tumors are found late or the patient is afraid of surgery until the tumor bleeds, which makes the surgery even more difficult.