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Definition of Autoimmune polyglandular syndrome (APS) (cont.)

By "autoimmune" is meant that the immune system (which normally wards off foreign invaders of the body) turns and attacks tissues such as skin, joints, liver, lungs, etc.) of the body. Examples of common systemic autoimmune diseases include rheumatoid arthritis, systemic lupus erythematosus, diabetes mellitus, Sjogren syndrome, scleroderma, Goodpasture syndrome, vitiligo, Addison disease, thyroiditis, and many others.