Patient: headache, dizziness and neck pain, discovered on November 26, found a shadow in the lung, shadow and fluid in the brain, and was diagnosed with brain metastasis of lung cancer. After 7 times of radiotherapy, the headache and dizziness are gone, and I can eat. The pathology result of chest puncture was that no cancer cells were found in the lung. What should I do if I want to make further diagnosis? Doctor: The diagnosis rate of lung puncture is not high, if the location is peripheral type, you can try again. If the location is peripheral, you can try again. If the location is central, you can try fibrinoscopy, and if the diagnosis is still not confirmed, you have to use thoracoscopy to make a clear diagnosis!