title: Letter: 'Opportunistic' auto-immune disease and 'opportunistic' malignancy from impaired cell mediated immunity?
mesh_terms: D001327:Autoimmune Diseases / Q000209:etiology*; D006801:Humans; D007111:Immunity, Cellular; D007153:Immunologic Deficiency Syndromes / Q000150:complications*; D007239:Infections / Q000209:etiology; D008180:Lupus Erythematosus, Systemic / Q000209:etiology; D009369:Neoplasms / Q000209:etiology*; D010392:Pemphigus / Q000209:etiology; D013601:T-Lymphocytes / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology