Thalassemia

An inherited blood disorder that is characterized by mutations in the DNA of cells that make hemoglobin (the substance in red blood cells that allows them to carry oxygen) and fewer red blood cells in the body than normal. People with mild thalassemia may need no treatment; those with a severe form may need regular blood transfusions. Several types of thalassemia exist including alpha-thalassemia, beta-thalassemia, Cooley's anemia and Mediterranean anemia.