The most metastatic part of kidney cancer is lung, followed by some other internal organs, such as liver, or adrenal glands, brain, bones, which are all easy to metastasize from kidney tumors, of course, the most common part is still lung. Generally, there is no symptom in early metastasis, but if there is coughing, coughing up blood or chest tightness, it means that the tumor is already very big or has caused pleural metastasis and hydrothorax, etc. Therefore, there is no symptom in early metastasis of kidney tumor to the lungs. If the metastasis to bone is in the late stage, bone pain in a certain part may also appear; metastasis to brain, its manifestation is the most obvious, may be very small lesions can cause cerebral edema, causing some brain tumor manifestations, such as vomiting.