<unk>  is a blood disorder passed down through families (inherited) in which the body makes an abnormal form of hemoglobin, the protein in red blood cells that carries oxygen. The disorder results in excessive destruction of red blood cells, which leads to anemia.
Thalassemia
Beta-thalassemia
Hereditary spherocytosis
Sideroblastic anemia
Diamond-Blackfan anemia
Argininemia
Paroxysmal nocturnal hemoglobinuria
Hereditary elliptocytosis