Gourt > Health > Conditions and Diseases > Genetic Disorders > Klinefelter Syndrome
Klinefelter's syndrome is a condition caused by a chromosome nondisjunction in males; affected individuals have a pair of X sex chromosomes instead of just one, and is associated with additional risk for some medical conditions. It is named after Dr. Harry Klinefelter, a medical researcher at Massachusetts General Hospital, Boston, Massachusetts, who first described this condition in 1942.Klinefelter HF Jr, Reifenstein EC Jr, Albright . Syndrome characterized by gynecomastia, aspermatogenesis without a-Leydigism and increased excretion of follicle-stimulating hormone. J Clin Endocr Metab 1942;2:615-624.
Cause
The XXY chromosome arrangement is one of the most common genetic variations from the XY karyotype, occurring in about 1 in 500 to 1000 male births. Because of the extra chromosome, individuals with the condition are usually referred to as "XXY Males", or "47,XXY Males" rather than as "suffering from Klinefelter's syndrome."
In mammals with more than one X chromosome, the genes on all but one X chromosome are barred from being expressed. This happens in XXY males as well as XX females. A few genes, however, have corresponding genes on the Y chromosome and are not barred. These triploid genes in XXY males may be responsible for symptoms associated with Klinefelter's syndrome.
More on [ Klinefelter's syndrome ]
Genitourinary Disorders
Causes :: Mental Retardation
is ready for this Genetics exam tomorrow...if I can remember the karyotype for Klinefelter Syndrome after 2 games of beer pong...I got this!
flgirl613 (flgirl613) Tue, 03 Nov 2009 01:45:48 -0000
is ready for this Genetics exam tomorrow...if I can remember the karyotype for Klinefelter Syndrome after 2 games of beer pong...I got this!
@mariashriver I totally support Alzheimer's but you never see walks for Klinefelter's syndrome thou. Whats to say Alzheimer's isn't genetic?
CamEvenson (Cam Evenson) Sun, 01 Nov 2009 17:53:25 -0000
@mariashriver I totally support Alzheimer's but you never see walks for Klinefelter's syndrome thou. Whats to say Alzheimer's isn't genetic?
Klinefelter S Syndrome: this is for leslie and all the parents in need of more perspectivesâ¦â¦̷.. http://bit.ly/2fX73A
duarondusit (Steve Edenfield) Thu, 29 Oct 2009 14:12:35 -0000
Klinefelter S Syndrome: this is for leslie and all the parents in need of more perspectives……̷.. http://bit.ly/2fX73A
American Association for Klinefelter Syndrome Information and Support (AAKSIS) - Email list, conference, membership, newsletter, regional groups and resource links.
Meta Description: [ American Association for Klinefelter Syndrome Information and Support (AAKSIS) ]
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drkoop.com: Klinefelter Syndrome - A chromosome abnormality that affects only men and causes hypogonadism.
Genetic Org Home - Information about Klinefelter Syndrome, when it was first discovered, the common characteristics, and treatment.
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Klinefelter Syndrome - The Ohio Support Network - Specific health and educational resources for Ohio KS individuals and their families. Links to local and national healthcare, ongoing research, conferences, and support meetings.
Klinefelter Syndrome Support - Educational and support information about Klinefelter Syndrome/XXY and its variants.
Meta Description: [ Website for Klinefelter Syndrome support ]
Klinefelter's Syndrome gynecomastia - Male chest recontouring for large male breasts (gynecomastia) found in Klinefelter's Syndrome with surgical reduction by excision and liposuction. Before and after photographs, links, movies, and patient question and answer boards.
Meta Description: [ Male liposuction and breast reduction for gynecomastia (male breast deformity) - Bermant plastic and cosmetic surgery ]
Turner Center - Literature on XYY, Klinefelter, XXX, and Turner's Syndrome.
XXY Information (Klinefelter Syndrome) - Medical information, news, and links.
Meta Description: [ A medical and information site for Klinefelter Syndrome, XXY, and variants ]
XXY List - A private discussion list for which you must be an XXY to subscribe.
Meta Description: [ We are XXY. Our mission is early diagnosis, education, and make the world a better place for our XXY brothers. ]
Yahoo!: XXYList - XXY is a genetic anomaly which occurs 1 in 500 in the general population today. Men with this condition usually have Klinefelters Syndrome. Offers joining instructions for this support group.
Meta Description: [ xxylist: Private Discussion List for XXY's - by Invitation only. ]
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