blood-cerebrospinal fluid barrier
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blood-ce·re·bro·spi·nal flu·id bar·ri·er, blood-CSF barrier
a barrier located at the tight junctions that surround and connect the cuboidal epithelial cells on the surface of the choroid plexus; capillaries and connective tissue stroma of the choroid do not represent a barrier to protein tracers or dyes.
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