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Definition of Leptomeningeal

Leptomeningeal: Having to do with the leptomeninges, the two innermost layers of tissues that cover the brain and spinal cord. Leptomeningeal metastasis refers to cancer that has spread from the original (primary) tumor to the leptomeninges.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=40030
Last Editorial Review: 6/14/2012

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