The most common ones are: (a) When lung cancer metastasizes to the brain and central nervous system, neurological symptoms such as headache, vomiting, vertigo, diplopia, ataxia, cerebral nerve palsy, weakness of one limb or even hemiplegia may occur. In severe cases, symptoms of intracranial hypertension may occur. Note: The symptoms of brain metastasis are complicated, it is recommended to do brain MRI examination to confirm the diagnosis. Yan Ming, Department of Thoracic Surgery, Henan Cancer Hospital (b) Metastasis to bones, the incidence from high to low are ribs, spinal bones, pelvis, with local pain and pressure pain. And progressive aggravation. (iii) In case of metastasis to liver, there may be anorexia, pain in liver area, hepatomegaly, jaundice and ascites. Note: Anorexia cannot be considered as the presence of liver metastasis. Ultrasound or CT is required to confirm the diagnosis. (d) Lung cancer metastasis to lymph nodes The supraclavicular lymph node is the site of lung cancer metastasis, which can be asymptomatic and patients can come to the clinic by themselves. Typically, they are located in the anterior oblique muscle area (a little bit behind the laryngeal node), fixed and hard, gradually increasing in size, and can be fused. The size of the lymph nodes does not necessarily reflect the early or late stage of the disease. They are mostly painless, and subcutaneous nodes may be palpable in the case of subcutaneous metastases.