A brain tumor is a mass of abnormal blood cells. It may be inside your brain or next to it. Brain tumors can grow and press harmfully against healthy brain tissue. This can cause a wide range of problems throughout your body, and can severely impact your life. Brain tumor surgery is performed by a neurosurgeon to remove all or part of a tumor from the brain. The NeuroMedical Center’s Jon D. Olson, M.D., the area’s only board certified Neurologist/Neuro-Oncologist, has unique expertise in the diagnosis and treatment of cancerous tumors of the brain, and offers innovative therapy options including Optune to treat brain tumors.