National Organization for Rare Disorders, Inc.
Important
It is possible that the main title of the report Bardet Biedl Syndrome
is not the name you expected. Please check the synonyms listing to find
the alternate name(s) and disorder subdivision(s) covered by this report.
Synonyms
- Biedl-Bardet Syndrome
Disorder Subdivisions
- None
General Discussion
Bardet-Biedl syndrome is a rare, genetic multisystem disorder characterized primarily by deterioration of the cells that receive light stimuli (cone and rod cells) in the retina of the eyes (progressive cone-rod dystrophy), an extra finger near the pinky or an extra toe near the fifth toe (postaxial polydactyly), a condition in which fat is disproportionately distributed on the abdomen and chest rather than the arms and legs (truncal obesity), diminished size and decreased function of the gonads (testes) in males (hypgonadism), kidney (renal) abnormalities, and learning difficulties. Visual abnormalities usually become progressively worse and may ultimately result in blindness. Kidney (renal) abnormalities may progress to cause life-threatening complications. Learning difficulties are a common finding due, in part, to vision loss. Only a minority of affected individuals have severe mental impairment. Most cases of Bardet-Biedl syndrome are inherited as an autosomal recessive trait.
Bardet-Biedl syndrome shows significant overlap with a disorder called Laurence-Moon syndrome. In fact, in the past, these disorders were considered the same and referred to as Laurence-Bardet-Biedl syndrome. Eventually, researchers decided that the two disorders despite numerous similarities were distinct entities. However, recent research has demonstrated that some individuals with the clinical findings of Laurence-Moon syndrome have had mutations in genes linked to Bardet-Biedl syndrome. This discovery has led some researchers to suggest that little evidence exists to continue to classify these two disorders as distinct entities.
Resources
National Association for Visually Handicapped
22 West 21st Street
New York, NY 10010
USA
Tel: 2128893141
Fax: 2127272931
Email: staff@navh.org
Internet: http://www.navh.org
Foundation Fighting Blindness, Inc.
11435 Cronhill Drive
Owings Mills, MD 21117-2220
Tel: (410)568-0150
Fax: (410)363-2393
Tel: (800)683-5555
TDD: (800)683-5551
Email: info@blindness.org
Internet: http://www.fightblindness.org
Retinitis Pigmentosa International
P.O. Box 900
Woodland Hills, CA 91365
Tel: (818)992-0500
Fax: (818)992-3265
Tel: (800)344-4877
Email: info@international.org
Internet: http://www.rpinternational.org
National Association for Parents of Children with Visual Impairments (NAPVI)
P.O. Box 317
Watertown, MA 02472
Tel: (617)972-7441
Fax: (617)972-7444
Tel: (800)562-6265
Email: napvi@perkins.org
Internet: http://www.napvi.org
American Council of the Blind, Inc.
1155 15th Street
Suite 1004
Washington, DC 20005
Tel: (202)467-5081
Fax: (202)467-5085
Tel: (800)424-8666
Internet: http://www.acb.org
American Foundation for the Blind
11 Penn Plaza
Suite 300
New York, NY 10001
Tel: (212)502-7600
Fax: (212)502-7777
Tel: (800)232-5463
TDD: (212)502-7662
Email: afbinfo@afb.org
Internet: http://www.afb.org
Blind Children's Fund
311 W. Broadway
Suite 1
Mt. Pleasant, MI 48858
Tel: (989)779-9966
Fax: (989)779-0015
Email: bcf@blindchildrensfund.org
Internet: http://www.blindchildrensfund.org
American Printing House for the Blind
1839 Frankfort Avenue
P.O. Box 6085
Louisville, KY 40206-0085
USA
Tel: 5028952405
Fax: 5028992274
Tel: 8002231839
Email: info@aph.org
Internet: http://www.aph.org
Prevent Blindness America
211 West Wacker Drive
Suite 1700
Chicago, IL 60606
Tel: (312)363-6001
Fax: (312)363-6052
Tel: (800)331-2020
Email: info@preventblindness.org
Internet: http://www.preventblindness.org
Foundation Fighting Blindness (Canada)
60 St. Clair Ave East
Suite 703
Toronto, Ontario, M4T 1N5
Canada
Tel: 416-360-4200
Fax: 416-360-0060
Tel: 800-461-3331
Email: info@ffb.ca
Internet: http://www.ffb.ca
Retina International
Ausstellungsstrasse 36
CH-8005
Zürich,
Switzerland
Tel: (0)44 444 10 77
Fax: (0)44 444 10 70
Email: c.fasser@e-link.ch
Internet: http://www.retina-international.org
Perkins School for the Blind
175 North Beacon St.
Watertown, MA 02472
Tel: (617)924-3434
Fax: (617)926-2027
Email: Info@Perkins.org
Internet: http://www.Perkins.org
For a Complete Report
This is an abstract of a report from the National Organization for Rare Disorders, Inc. ® (NORD). A copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html
The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.
It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report.
This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.
For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site www.rarediseases.org or email orphan@rarediseases.org
Last Updated: 8/7/2007
Copyright 1994, 1996, 2001, 2002, 2007 National Organization for Rare Disorders, Inc.
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