Experts tell you how brain metastasis of lung cancer occurs

Most lung cancer patients are already in the advanced stage when the disease is discovered, and advanced lung cancer will metastasize to the brain. But what are the symptoms of brain metastasis of lung cancer? Let our experts give a detailed introduction to this issue.

The incidence of symptoms of brain metastasis from lung cancer is relatively high, reaching 35% to 50%. Symptoms of brain metastasis from lung cancer often include headache, vomiting, facial nerve paralysis, hemiplegia, blurred vision, aphasia, muscle weakness, etc. as the first symptoms and are misdiagnosed as cerebrovascular disease, primary brain tumors, tuberculous meningitis, and intracranial hypertension.

Why is lung cancer so prone to brain metastasis? This is because there are a large number of anastomoses between the pulmonary blood vessels and the vertebral arteries and venous arterial plexus that supply the brain, which allows lung cancer cells to bypass the filtration of the pulmonary capillaries and directly metastasize to the brain through the heart and carotid arteries. Based on the symptoms of lung cancer brain metastasis, those who experience any of the following should be highly alert to the beginning or brain metastasis of lung cancer:

1. If lung cancer has been confirmed, even if there are no symptoms or signs of brain metastasis of lung cancer, a routine CT scan should be performed.

2. Patients with signs of intracranial hypertension or focal brain damage, such as severe headache, vomiting, anisocoria, hemiplegia, etc., and accompanied by respiratory symptoms or swollen lymph nodes, hoarseness, should also undergo routine chest X-ray examinations, sputum examinations for cancer cells, lymph node biopsies, and fiberoptic bronchoscopy to avoid delays in the discovery of symptoms of brain metastasis of lung cancer, which may lead to worsening of the disease.

3. Middle-aged and elderly people or long-term smokers who have neuropsychiatric symptoms that are difficult to explain by general cerebrovascular disease, such as dizziness, vertigo, irritability, drowsiness, aphasia, muscle weakness, facial nerve paralysis, etc.

Therefore, the symptoms of brain metastasis from lung cancer are very important. If we understand the symptoms of brain metastasis from lung cancer, we can better carry out effective treatment.

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