title: Apoptosis in lichen planus.
mesh_terms: D002470:Cell Survival; D006801:Humans; D007111:Immunity, Cellular; D008010:Lichen Planus / Q000276:immunology / Q000473:pathology*; D008854:Microscopy, Electron; D012867:Skin / Q000648:ultrastructure; D013601:T-Lymphocytes / Q000648:ultrastructure