[cavities within the brain which are filled with cerebrospinal fluid, including the two lateral, the third, and linked by the aqueduct, the fourth ventricles; lined by ependyma which in certain regions, is invaginated by vascular fringes of pia mater to form the choroid plexuses. ( CSP )]
UMLS (NCI) C0007799 Relation/PAR: brain
Relation/CHD: choroid plexus