This glossary contains concise definitions of terms commonly used in neurosurgery.
Aneurysm A localized balloon-like dilation of an artery caused by a weakness in the arterial wall, often occurring in the circle of Willis.
AVM (Arteriovenous Malformation) A congenital vascular anomaly where arteries connect directly to veins without capillaries, potentially causing hemorrhage.
Burr Hole A small hole drilled into the skull to relieve pressure or allow access for surgery or catheter placement.
Chiari Malformation A structural defect where brain tissue extends into the spinal canal, often involving the cerebellar tonsils.
Craniotomy A surgical procedure where part of the skull is removed to access the brain.
Dural Tear An unintended opening in the dura mater, which can cause cerebrospinal fluid leakage.
EVD (External Ventricular Drain) A temporary catheter placed in the ventricles to drain CSF and monitor intracranial pressure.
Glioblastoma The most aggressive and common malignant brain tumor in adults, classified as WHO grade IV.
Subdural Hematoma A collection of blood between the dura mater and the arachnoid membrane, usually due to trauma.
Stereotactic Surgery A minimally invasive form of surgical intervention that uses a three-dimensional coordinate system to locate small targets inside the body.