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Genetic and Rare Diseases Information Center (GARD)

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Adenosine deaminase deficiency


Other Names for this Disease

  • ADA deficiency
  • ADA-SCID
  • Adenosine deaminase deficient severe combined immunodeficiency
  • SCID due to ADA deficiency
  • Severe combined immunodeficiency due to ADA deficiency
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.

Overview

Adenosine deaminase deficiency (ADA) is an inherited condition that affects the immune system and typically leads to severe combined immunodeficiency (SCID). People with SCID have a reduced or absent immune response which leaves them vulnerable to frequent bacterial, viral, and fungal infections. Most people affected by ADA develop symptoms of the condition before 6 months of age. However, approximately 10-15% of affected people have a "delayed" onset of symptoms; diagnosis of these cases, which are often less severe, typically takes place later in childhood (often between age 1 and 10) or even into adulthood. Signs and symptoms of ADA include pneumonia, chronic diarrhea, widespread skin rashes, slowed growth and/or developmental delay. ADA is caused by changes (mutations) in the ADA gene and is inherited in an autosomal recessive manner.[1][2] The most effective treatment is transplantation of blood-forming stem cells from the bone marrow of a healthy person.[3][8061
Last updated: 1/4/2015

References

  1. Adenosine deaminase deficiency. Genetics Home Reference. July 2013; http://ghr.nlm.nih.gov/condition/adenosine-deaminase-deficiency.
  2. Michael Hershfield, MD. Adenosine Deaminase Deficiency. GeneReviews. July 2014; http://www.ncbi.nlm.nih.gov/books/NBK1483/.
  3. Arye Rubinstein, MD. Adenosine deaminase deficiency: Treatment. UpToDate. September 2013; Accessed 1/4/2015.
  4. Alan P Knutsen, MD. Purine Nucleoside Phosphorylase Deficiency. Medscape Reference. July 2013; http://emedicine.medscape.com/article/887823-overview.
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Basic Information

In Depth Information

  • 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.
  • Online Mendelian Inheritance in Man (OMIM) is a 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 Adenosine deaminase deficiency. Click on the link to view a sample search on this topic.

Insurance Issues

Other Names for this Disease
  • ADA deficiency
  • ADA-SCID
  • Adenosine deaminase deficient severe combined immunodeficiency
  • SCID due to ADA deficiency
  • Severe combined immunodeficiency due to ADA deficiency
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.