Patient: Resected for renal occupancy in 2001, pathology was metastatic cell tumor of the renal pelvis. A month ago during physical examination, a mass in the medullary cavity of the left femur with slight destruction of the surrounding bone was found to be malignant. Is it suitable for surgery? Tang Shun, Department of Bone Oncology, Peking University People’s Hospital: Patients with kidney cancer have a good prognosis, and even if bone metastases appear, they can still have a good outcome after active and correct treatment.