A congenital nonspherocytic hemolytic anemia characterized by nonspherocytic hemolytic anemia of Dacie type I with Heinz bodies seen in erythrocytes after splenectomy that has_material_basis_in heterozygous mutation in HBA1, HBA2 or HBB on chromosome 11p15.4, 16p13.3, and 16p13.3, respectively.