Benign brain tumors are not cancerous. They have well-defined borders and are not deeply rooted in brain tissue, making them easier to surgically remove -- assuming they are in an area of the brain that can safely be operated on. Still, a benign brain tumor may damage cells around it by causing inflammation and putting pressure on the tissue under and around it. Symptoms of benign brain tumors are similar to those caused by malignant brain tumors: headaches, confusion, sleepiness, changes in personality. If brain scans show the presence of a mass, the doctor may also ask for a biopsy to determine whether or not the tumor is cancer. That can be done during surgery or by drilling a hole in the skull to extract a tissue sample. Follow the links below to find WebMD's comprehensive coverage about benign brain tumors, their symptoms, treatment, and much more.