| Namespace | MPheno.ontology | Obsolete | false |
| description | any structural anomaly of the infoldings of blood vessels of the pia mater covered by a thin coat of ependymal cells that form tufted projections into the third, fourth, and lateral ventricles of the brain; choroid plexuses secrete cerebrospinal fluid (CSF) and act as a filtration system, removing metabolic waste, foreign substances, and excess neurotransmitters from the CSF |