title: Essential relationship between the lymphoid system, immunity, and malignancy.
mesh_terms: D000222:Adaptation, Physiological; D000375:Aging; D000818:Animals; D000917:Antibody Formation; D006801:Humans; D007109:Immunity; D007153:Immunologic Deficiency Syndromes / Q000150:complications; D007166:Immunosuppressive Agents / Q000009:adverse effects; D008221:Lymphoid Tissue / Q000502:physiology*; D012157:Mononuclear Phagocyte System / Q000502:physiology*; D009369:Neoplasms / Q000209:etiology* / Q000276:immunology
chemical_list: D007166:Immunosuppressive Agents