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Anemias, Congenital Dyserythropoietic

A familial disorder characterized by Anemia with multinuclear Erythroblasts, karyorrhexis, asynchrony of nuclear and cytoplasmic maturation, and various nuclear abnormalities of Bone Marrow Erythrocyte precursors (Erythroid Precursor Cells). Type II is the most common of the 3 types; it is often referred to as HEMPAS, based on the Hereditary Erythroblast Multinuclearity with Positive Acidified Serum test.