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cerebrospinal fluid diversion (seh-REE-broh-SPY-nul FLOO-id dih-VER-zhun)
A process used to drain fluid that has built up around the brain and spinal cord. A shunt (a long, thin tube) is placed in a ventricle of the brain and threaded under the skin to another part of the body, usually the abdomen. The shunt carries excess fluid away from the brain so it may be absorbed elsewhere in the body.