title: Ultrastructure of vascular and connective tissue changes in primary syphilis.
abstract: Electron microscopical studies of primary syphilitic lesions showed intensive changes in the capillaries in the form of endothelial proliferation and extensive infilitration of different cells in the surrounding connective tissue. The degenerative changes in axon terminals could explain the painless course of primary induration.
mesh_terms: D002196:Capillaries / Q000382:microbiology / Q000648:ultrastructure*; D002455:Cell Division; D002465:Cell Movement; D002601:Chancre / Q000382:microbiology / Q000473:pathology*; D003238:Connective Tissue / Q000382:microbiology / Q000648:ultrastructure*; D004727:Endothelium / Q000648:ultrastructure; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D012867:Skin / Q000098:blood supply / Q000382:microbiology / Q000648:ultrastructure*; D013587:Syphilis / Q000473:pathology*; D014210:Treponema pallidum / Q000648:ultrastructure