title: Fluorescent granular perithelial cells in the meninges and optic nerve of the human embryo.
abstract: Cells containing small dense granules were present in the meninges surrounding the human embryonic optic nerve from 8 weeks post-conception. Typical fluorescent granular perithelial cells (FGP) containing large dense granules were present in the meninges by 12 weeks post-conception and in the large perivascular space around large vessels within the optic nerve by 14-15 weeks post-conception. The time of appearance of these cells in the CNS seems to be related to the stage of vascularization rather than to the stage of CNS development.
authors.affiliation: Department of Anatomy, University of Dundee, Scotland.
authors.forename: R R
authors.initials: RR
authors.lastname: Sturrock
mesh_terms: D003594:Cytoplasmic Granules / Q000648:ultrastructure; D006801:Humans; D008578:Meninges / Q000196:embryology* / Q000648:ultrastructure; D008854:Microscopy, Electron; D009900:Optic Nerve / Q000196:embryology* / Q000648:ultrastructure