Immunological processes involving the oral mucosa in lichen planus.
D001402:B-Lymphocytes; D006801:Humans; D007958:Leukocyte Count; D008010:Lichen Planus / Q000276:immunology*; D008264:Macrophages; D009061:Mouth Mucosa / Q000276:immunology*; D012867:Skin / Q000276:immunology*; D013601:T-Lymphocytes