All brain tumors are bad, but among them there are those who are even worse. That is, tumors that doctors call “neuroma” which originate from the nerve cells that make up the brain, and tumors that doctors call “glioma” which originate from the supporting glial cells of the brain that carry nerve cells are worse.
When we say malignant brain tumors; we mean that the patient has to undergo brain tumor surgery repeatedly, even if the tumor is surgically removed since it can never be totally removed and the remaining cells form a tumor again.
Then why are we operating upon the patient? Our first aim is to prevent the tumor from growing larger and killing the patient, that is, to save extra time for the patient. The second aim by removing the tumor and subjecting it to further investigation is to identify drug and radiation treatments that may be useful for the treatment of the patient; i.e. to increase the chances of the patient’s survival. Sometimes when a tumor that we thought to be malignant before surgery is found out to be benign after the surgery; we are very pleased that the patient’s life has been saved.