Vermis: The middle part of the cerebellum between the two hemispheres.
Vertebra: Any of the 33 bones of the spinal column.
Vertebroplasty: An image-guided procedure in which a special bone cement is injected into a fractured vertebra to stabilize the bone and relieve pain. Vertebroplasty is often used to treat spinal compression fractures.
Vertigo: An abnormal sensation of rotation or movement of one's self or the environment.
White matter: The part of the brain inside the cortex (the wrinkled gray matter). White matter consists of glial cells, nerves, and axons that transmit impulses.
WHO tumor grading: The standard established by the World Health Organization (WHO) to rate tumors.
- Grade I tumors are slow-growing, nonmalignant, and associated with long-term survival.
- Grade II tumors are relatively slow-growing but sometimes recur as higher grade tumors. They can be nonmalignant or malignant.
- Grade III tumors are malignant and often recur as higher grade tumors.
- Grade IV tumors reproduce rapidly and are very aggressive malignant tumors.
X-ray: Application of electromagnetic radiation to produce a film or picture of a bone or soft-tissue area of the body
