Synonyms
- 47,XYY Karyotype
- 47,XYY Syndrome
- Diplo-Y Syndrome
- Polysomy Y
- XYY Chromosome Pattern
- YY Syndrome
General Discussion
XYY syndrome is a rare chromosomal disorder that affects males. It is caused by the presence of an extra Y chromosome. Males normally have one X and one Y chromosome. However, individuals with this syndrome have one X and two Y chromosome. Affected individuals are usually very tall and thin. Many experience severe acne during adolescence. Additional symptoms may include antisocial or behavioral problems and learning disabilities. Intelligence is usually normal, although IQ, on average, is 10 to 15 points lower than siblings.
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Resources
March of Dimes Birth Defects Foundation
1275 Mamaroneck Avenue
White Plains, NY 10605
Tel: (914)428-7100
Fax: (914)997-4763
Tel: (888)663-4637
Email: Askus@marchofdimes.com
Internet: http://www.marchofdimes.com
National Mental Health Consumers' Self-Help Clearinghouse
1211 Chestnut Street
Suite 1207
Philadelphia, PA 19107-6312
USA
Tel: 2157511810
Fax: 2156366312
Tel: 8005534539
Email: info@mhselfhelp.org
Internet: http://www.mhselfhelp.org
National Mental Health Association
2001 North Beauregard Street
12th Floor
Alexandria, VA 22311
USA
Tel: 7036847722
Fax: 7036845968
Tel: 8009696642
TDD: 8004335959
Email: infoctr@nmha.org
Internet: http://www.nmha.org
National Alliance for the Mentally Ill
Colonial Place Three
2107 Wilson Blvd.
Suite 300
Arlington, VA 22201-3042
ISA
Tel: 7035247600
Fax: 7035249094
Tel: 8009996264
TDD: 7035167227
Email: membership@nami.org
Internet: http://www.nami.org
NIH/National Institute of Mental Health
6001 Executive Blvd
Rm 8184, MSC 9663
Rockville, MD 20892-9663
Tel: (301)443-4513
Email: nimhinfo@nih.gov
Internet: http://www.nimh.nih.gov/
UNIQUE - Rare Chromosome Disorder Support Group
P.O. Box 2189
Caterham
Surrey, Intl CR3 5GN
United Kingdom
Tel: 44 0 1883 330766
Fax: 44 0 1883 330766
Email: info@rarechromo.org
Internet: http://www.rarechromo.org
MUMS (Mothers United for Moral Support, Inc) National Parent-to-Parent Network
150 Custer Court
Green Bay, WI 54301-1243
USA
Tel: 9203365333
Fax: 9203390995
Tel: 8773365333
Email: mums@netnet.net
Internet: http://www.netnet.net/mums/
Klinefelter Syndrome & Associates (KS&A)
11 Keats Court
Coto de Caza, CA 92679
Tel: (888)999-9428
Fax: (949)858-3443
Tel: (888)999-9428
Email: khenry@genetic.org
Internet: http://www.genetic.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: 5/23/2008
Copyright 1990, 1992, 1998, 1999, 2002National Organization for Rare Disorders, Inc.