What happens once you have brain tumor?

Brain tumor: This depends upon the size and location of the tumor, as well as whether the tumor is benign or malignant (cancer). A small benign tumor may exist for years and you may never know it is there. Even a large benign tumor, that may grow very slowly over a period of years, may produce no symptoms even though it is the size of a golf ball or larger.

Depends: It is very much dependent on what type of brain tumor you have. Some tumors are easily treated and cured with surgery alone, other tumors require very intensive, difficult therapy and still cause death. It very much depends on the exact type and location of tumor.