title: The fine structure of chronically active multiple sclerosis plaques.
mesh_terms: D001369:Axons / Q000648:ultrastructure; D002908:Chronic Disease; D003711:Demyelinating Diseases / Q000473:pathology; D006801:Humans; D009103:Multiple Sclerosis / Q000473:pathology*; D009186:Myelin Sheath / Q000648:ultrastructure*; D013116:Spinal Cord / Q000648:ultrastructure