A blood disorder that occurs when bone marrow (where red and white blood cell and platelet production occurs) is attacked by autoantibodies. This results in the body having fewer white blood cells and platelets, causing fatigue, and lowering resistance to infection. This culminates in extreme thinning of the blood leading to uncontrolled bleeding.
Severity varies from person to person, from moderately low to very low blood counts. Diagnosis is based on clinical evaluations, testing for blood cell counts, and bone marrow biopsies.