<unk>   refers to<unk>  anemia which is primarily due to<unk>  disorders.
Congenital hemolytic anemia
Paroxysmal nocturnal hemoglobinuria
Paroxysmal cold hemoglobinuria
Familial erythrocytosis
Drug induced hemolytic anemia
Hereditary spherocytosis
Congenital dyserythropoietic anemia
Sideroblastic anemia