autoimmune disorder

Autoimmunity is the failure of an organism to recognize its own constituent parts (down to the sub-molecular levels) as "self", which results in an immune response against its own cells and tissues. Any disease that results from such an aberrant immune response is termed an autoimmune disease. Prominent examples include Coeliac disease, diabetes mellitus type 1 (IDDM), systemic lupus erythematosus (SLE), Sjögren's syndrome,  multiple sclerosis (MS), Hashimoto's thyroiditis, Graves' disease, idiopathic thrombocytopenic purpura, and rheumatoid arthritis (RA). See List of autoimmune diseases.
See more at Wikipedia.org...

Autoimmune disorder A disorder caused by a reaction of an individual's immune system against the organs or tissues of the body. [more]Autoimmune disorder - Community and Resources

Noun
1. any of a large group of diseases characterized by abnormal functioning of the immune system that causes your immune system to produce antibodies against your own tissues
(synonym) autoimmune disease
(hypernym) disease
(hyponym) type I diabetes, insulin-dependent diabetes mellitus, IDDM, juvenile-onset diabetes, juvenile diabetes, growth-onset diabetes, ketosis-prone diabetes, ketoacidosis-prone diabetes, autoimmune diabetes
(part-meronym) autoimmunity