Patient: Resected for renal occupancy in 2001, pathology was metastatic cell tumor of the renal pelvis. A month ago, a physical examination revealed a mass in the medullary cavity of the left femur with slight destruction of the surrounding bone, which is malignant. Please ask: Is it suitable for surgery? Tang Shun: Patients with kidney cancer have a good prognosis, and even if bone metastases appear, they can still have good results after active and correct treatment. Whether to operate or not needs to be decided according to the patient’s imaging data, and if the patient is considered to have the possibility of pathological fracture according to the tumor destruction, then surgery has the function of removing the lesion and preventing fracture.