Cerebrospinal fluid.

An x-ray device linked to a computer that produces an image of a predetermined cross-section of the brain. A special dye material may be injected into the patient's vein prior to the scan to help make any abnormal tissue more evident.

Abnormal sacs containing gas, fluid, or a semisolid material, with a membranous lining.

Relating to or producing a toxic effect on cells. Capable of killing cells.