Bone marrowactive hemophagocytosis,elevatedserum levels of ferritin (872 ng/mL; normal <500 ng/mL), andsoluble interleukin-2 receptor a chain (CD25) (9016 pg/mL),normal (239 to 7887 pg/mL),_severe anemia,thrombocytopenia was moderate with anadir of 36,109/L platelets. The gene discussed is IL2RA; the disease is anemia (phenotype).