Congenital dyserythropoietic anemia type III (Orphanet_98870) (CDA III) is a rare form of CDA (see this term) characterized by dyserythropoiesis, with big multinucleated erythroblasts in the bone marrow, and manifesting with mild to moderate anemia. Also known as: CDA III, CDA type 3, CDA type III, Congenital dyserythropoietic anemia type 3.