Origins of myelodysplastic syndromes after aplastic anemia.

To the editor: The course of aplastic anemia (AA) is often complicated by the development of clonal disorders such as paroxysmal nocturnal hemoglobinuria (PNH) and secondary myelodysplastic syndromes (sMDS).[1][1][⇓][2][⇓][3][⇓][4]-[5][5] Identification of patients at risk for development of

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