Diamond-Blackfan anemia (MONDO_0015253, a Monarch Disease Ontology entry) is a congenital aregenerative and often macrocytic anemia with erythroblastopenia. Also known as: Aase syndrome, Aase-Smith II syndrome, Blackfan - Diamond syndrome, Blackfan-Diamond anaemia, Blackfan-Diamond anemia, DBA, Diamond Blackfan Anemia, chronic constitutional pure red cell anaemia.