Synonyms: fourth ventricle epithelium of choroid plexus fourth ventricle epithelial tissue of choroid plexus epithelium of choroid plexus of fourth ventricle chorioid plexus of cerebral hemisphere epithelium of fourth ventricle choroid plexus epithelial tissue of fourth ventricle choroid plexus epithelium of fourth ventricle epithelium of chorioid plexus of cerebral hemisphere of fourth ventricle fourth ventricle epithelium of chorioid plexus of cerebral hemisphere epithelial tissue of choroid plexus of fourth ventricle fourth ventricle choroid plexus epithelial tissue fourth ventricle chorioid plexus of cerebral hemisphere epithelium chorioid plexus of cerebral hemisphere epithelial tissue of fourth ventricle epithelial tissue of chorioid plexus of cerebral hemisphere of fourth ventricle fourth ventricle chorioid plexus of cerebral hemisphere epithelial tissue fourth ventricle epithelial tissue of chorioid plexus of cerebral hemisphere