>Kinetic classification ( Classified according to etiology and pathogenesis) Decreased erythropoiesis I Proliferation and differentiation abnormalities fsc HSC: AA. Fanconis anemia MDs Erythrocytic progenitors Pure red cell aplasia, Anemias caused by kidney failure and endocrine disordersKinetic classification (Classified according to etiology and pathogenesis) 一 、Decreased erythropoiesis 1 Proliferation and differentiation abnormalities of SC HSC: AA, Fanconis anemia, MDS Erythrocytic progenitors : Pure red cell aplasia, Anemias caused by kidney failure and endocrine disorders