NCIt related terms : CNS-Leptom; Leptomeningeal; leptomeninx;
NCIt definition : The two innermost layers of tissue that cover the brain and spinal cord, the arachnoid
mater and the pia mater.;
Alternative definition : NCI-GLOSS: Having to do with the two innermost meninges (thin layers of tissue that
cover and protect the brain and spinal cord).; CDISC: The two innermost layers of tissue that cover the brain and spinal cord, the
arachnoid mater and the pia mater. (NCI); UBERON: Pia mater or arachnoid mater.;