Thalassemia
Thalassemia is an inherited blood disorder that reduces the production of functional hemoglobin (the protein in red blood cells that carries oxygen). This causes a shortage of red blood cells and low levels of oxygen in the bloodstream, leading to a variety of health problems. There are two main types of thalassemia, http://rarediseases.info.nih.gov/gard/621/alpha-thalassemia/resources/1" target="_blank">alpha thalassemia and http://rarediseases.info.nih.gov/gard/871/beta-thalassemia/resources/1" target="_blank">beta thalassemia. Signs and symptoms vary but may include mild to severe anemia, paleness, http://www.nlm.nih.gov/medlineplus/ency/article/003088.htm" target="_blank">fatigue, yellow discoloration of skin (jaundice), and bone problems. Beta thalassemia is caused by changes (mutations) in the http://ghr.nlm.nih.gov/gene/HBB" target="_blank">HBB gene while alpha thalassemia is caused by mutations in the http://ghr.nlm.nih.gov/gene/HBA1" target="_blank">HBA1 and/or http://ghr.nlm.nih.gov/gene/HBA2" target="_blank">HBA2 genes. Both are inherited in an autosomal recessive manner. Treatment depends on the type and severity of the condition but may include http://www.nlm.nih.gov/medlineplus/ency/patientinstructions/000431.htm" target="_blank">blood transfusions and/or http://www.nlm.nih.gov/medlineplus/folicacid.html" target="_blank">folic acid supplements.