Sometimes, cancer cells spread from where the cancer first started (the primary site) to other parts of the body. When the cells reach another part of the body, they may grow and form another tumour. This is called a secondary cancer or a metastasis.
This information is about secondary brain cancer. You may find it helpful to read it with our information about the type of primary cancer you have. We have other information about tumours that start in the brain, which are called primary brain tumours.