Weakness, Hb and HCT levels were 3.8 g/dL and 12%, respectively, a reticulocyte count of 1.8%, a platelet count of 10 K/mL, and a WBC count of 1.9 K/mL. Serum ferritin was 22 ng/mL. The diagnosis was aplastic anemia. The gene discussed is GSTM1; the disease is idiopathic aplastic anemia.