The symptoms of metastatic lung cancer mainly refer to the fact that lung cancer is not primary but metastasized from other places. lung cancer can also show lung infection, obstructive pneumonia and other manifestations, and the patient can show symptoms such as coughing, coughing sputum, fever, blood in sputum, etc. 4. metastatic lung cancer can also show metastasis to the rib cage, and obvious bone pain or even pathological fracture. In conclusion, the clinical manifestations of metastatic lung cancer are roughly similar to those of the primary lung cancer. In addition, metastatic lung metastasis may also show the manifestations of primary cancer, with breast cancer, liver cancer, prostate cancer and thyroid cancer metastasis being more common, and the manifestations of these cancers are often also seen.