: • Average age of onset symptoms: 3.7 ± 0.6 y • Mean age of diagnosis: 22.2 ± 1.7 y • Normocytic mild anemia: Hb 9.6 ± 0.2 g/dL with MCV 87.3 ± 1.0 • Reticulocyte index: 1.7 ± 0.1 • Mean serum ferritin: 464.8 ± 55.9 ng/mL • Splenomegaly: 102/122,83.6%的患者•输血依赖性:25/126,19.8%的患者