(47 XXY Syndrome; KS)
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- For babies: Smaller birth weight and slower muscle and motor development
For children and adults:
- Small firm testes, small penis
- Abnormal body proportions (long legs, short trunk)
- Tallness with extra long arms and legs
- Social and learning disabilities (common)
- Personality impairment
- Attention deficit hyperactivity disorder (ADHD)
- Speech and language problems—Children with KS often learn to speak later than other children do. They may have a difficult time reading and writing.
- Normal to borderline IQ
- Lack of ability to produce sperm (common)
- Lack of facial and body hair
- Enlarged breasts (common)
- Diminished sex drive, sexual dysfunction
- Increased strength
- More muscular, male appearance
- Growth of facial and body hair
- Better self-esteem
- Modulation of mood
- Increased energy
- Increased ability to concentrate
- Greater sex drive
- Improved bone density
Speech and Language Therapy
- Speech therapy
- Special education services
- Extra support and help with learning from parents and teachers
- Social skills training and psychological counseling
Klinefelter Syndrome and Associates http://www.genetic.org
National Institute of Child Health & Human Development http://www.nichd.nih.gov
Canadian Psychiatric Association http://www.cpa-apc.org
Canadian Psychological Association http://www.cpa.ca
Klinefelter syndrome. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated February 28, 2013. Accessed October 11, 2011.
Tell me about 47, XXY. Klinefelter Syndrome and Associates website. Available at: http://www.genetic.org/knowledge/support/action/199/#Brief%20Introduction%20to%20Klinefelter%20syndrome. Accessed August 20, 2013.
Klinefelter syndrome: overview. National Institute of Child Health & Human Development website. Available at: http://www.nichd.nih.gov/publications/pubs/klinefelter.cfm. Updated April 3, 2013. Accessed August 20, 2013.
- Reviewer: Kari Kassir, MD; Michael Woods, MD
- Review Date: 08/2013 -
- Update Date: 05/11/2013 -
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
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