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Lumbar Puncture

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Updated May 01, 2007

Definition: A procedure used to extract cerebral spinal fluid (CSF) to test for the presence of substances that indicate MS. In this procedure, a needle is inserted between spinal vertebrae and a small amount of CSF is extracted into a tube. Also called a spinal tap, lumbar punctures used to be a standard part of the diagnosis of MS. MRI scans are now considered more authoritative for diagnosing MS.
Also Known As: spinal tap
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