Monarch Disease Ontology entry MONDO_0019403 (congenital dyserythropoietic anemia) (CDA) is a heterogenous group of hematological disorders of late erythropoiesis and red cell abnormalities that lead to anemia. Five types of CDA are defined: CDA I, CDA II, CDA III, CDA IV and thrombocytopenia with CDA. Also known as: CDA, anemia, congenital dyserythropoietic, congenital dyshaematopoietic anaemia, congenital dyshaematopoietic anemia.