Causes of other types of aplastic anemia may be chemotherapy , radiation therapy , toxins , drugs, pregnancy , congenital disorder, or systemic lupus erythematosus . Symptoms arise as the consequence of bone marrow failure. Low white blood cell counts, or neutropenia, causes an increased risk of infection. Low platelet counts, or thrombocytopenia , results in bleeding of mucus membranes and skin. The disease may be acute or chronic , and is always progressive.
Risk factors are unknown.
The incidence is 2 out of 1 million people. Idiopathic aplastic anemia Please read this Important notice . Please read it.