title: Ultrastructure of epiretinal membrane removed by pars plana vitreoretinal surgery.
abstract: Electron microscopic study of an epiretinal membrane obtained from a 69-year-old black woman during pars plana vitreoretinal surgery with vitreous hemorrhage complicating a retinal vein obstruction revealed extensive proliferations of fibrous astrocytes that had secreted fibrillar and basement-membrane collagens. Hemosiderin-containing macrophages were also found. Neovascular elements were present and appeared identical to normal retinal capillaries.
mesh_terms: D003094:Collagen; D003238:Connective Tissue / Q000648:ultrastructure; D005260:Female; D006801:Humans; D008264:Macrophages / Q000648:ultrastructure; D008566:Membranes / Q000601:surgery / Q000648:ultrastructure; D008875:Middle Aged; D012160:Retina / Q000601:surgery / Q000648:ultrastructure*; D012171:Retinal Vessels / Q000648:ultrastructure; D014822:Vitreous Body / Q000601:surgery*
chemical_list: D003094:Collagen