Brain metastasis lung cancer is when lung cancer has spread to the brain. It can also occur when cancer from any other part of the body spreads to the brain, although it is most likely to come from the lungs. There can be multiple brain metastases and different parts of the brain can be affected.
Brain metastasis has similar symptoms as primary brain cancer. These include headaches, vomiting, nausea, and tiredness. Depending on which part of the brain is affected, different parts of the body might also get affected and having difficulty in speaking or walking is a common occurrence.