Definition: Neurosurgery refers to the surgical procedures or techniques used for treating nerve damage, including tumors and other benign conditions affecting nerves within the brain (including a tumor in a brain aneurysm). These procedures involve cutting through the affected area to remove the diseased tissue. The term "neurosurgery" is derived from the Latin words "neurone," meaning "nervous fiber," and "surgery," which means "operation." Therefore, it refers to any medical intervention that involves removing or disrupting a nerve from the brain.