How does cancer in your brain form?

The cancer cells break away from the primary tumor and travel to the brain, usually through the bloodstream, then commonly go to the part of the brain called the cerebral hemispheres or to the cerebellum. Cancer can also spread to the spine (metastatic spine tumors).

The 'hallucinations' which are caused by some of these kinds of drugs may make you see, hear, smell, taste or feel things that are not real.