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X-linked sideroblastic anemia


Other Names for this Disease
  • Anemia hereditary sideroblastic
  • Anemia sex-linked hypochromic sideroblastic
  • ANH1
  • Congenital sideroblastic anemia
  • Erythroid 5-aminolevulinate synthase deficiency
More Names
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Overview


X-linked sideroblastic anemia is an inherited disorder that prevents developing red blood cells (erythroblasts) from making enough hemoglobin. People with X-linked sideroblastic anemia have mature red blood cells that are smaller than normal (microcytic) and appear pale (hypochromic) because of the shortage of hemoglobin. This disorder also leads to an abnormal accumulation of iron in red blood cells. The iron-loaded erythroblasts, which are present in bone marrow, are called ring sideroblasts. These abnormal cells give the condition its name. The signs and symptoms of X-linked sideroblastic anemia result from a combination of reduced hemoglobin and an overload of iron. They range from mild to severe and most often appear in young adulthood. Common features include fatigue, dizziness, a rapid heartbeat, pale skin, and an enlarged liver and spleen (hepatosplenomegaly). Over time, severe medical problems such as heart disease and liver damage (cirrhosis) can result from the buildup of excess iron in these organs. X-linked sideroblastic anemia is caused by mutation in the ALAS2 gene. In rare cases, mutations are found in both the HFE gene and the ALAS2 gene, resulting in a more severe form of X-linked sideroblastic anemia. X-linked sideroblastic anemia is inherited in an X-linked recessive pattern.[1]
Last updated: 3/11/2013

References

  1. X-linked sideroblastic anemia. Genetics Home Reference (GHR). April 2009; http://ghr.nlm.nih.gov/condition/x-linked-sideroblastic-anemia. Accessed 3/11/2013.
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  • Medscape Reference provides information on this topic. Click on the link to view this information. You may need to register to view the medical textbook, but registration is free.
  • The Online Mendelian Inheritance in Man (OMIM) is an catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs.  Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss X-linked sideroblastic anemia. Click on the link to view a sample search on this topic.