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The information contained in the Organizational Database (ODB) is provided for informational purposes only. There is no implied endorsement by NORD. NORD does not promote or endorse participation in any specific organization. The information is subject to change without notice. Every effort is made to ensure that the details for each entry are as current as possible.

Klinefelter Syndrome & Associates

a/k/a: KS&A


P.O. Box 872
Pine, CO 80470-0872





800 Number


Email Address




The Klinefelter Syndrome & Associates (KS&A) is a voluntary, non-profit organization whose mission is to help individuals with one or more extra X and/or Y chromosomes and their families lead fuller and more productive lives. Klinefelter syndrome is characterized by the presence of an extra X chromosome in males. The most common symptoms of Klinefelter syndrome may include abnormally small testes and impaired function of the testes resulting in infertility. Some males with this disorder may have abnormally enlarged breasts (gynecomastia). The development of secondary sexual characteristics may be diminished resulting in a high-pitched voice and the lack of facial and body hair. Major muscles of the arms and legs may remain underdeveloped. Many other variants of Klinefelter syndrome can occur, including chromosome abnormalities such as 46,XY/47,XXY (mosaic), 48,XXXY, and 48,XXYY. KS&A also provides support to individuals with other sex chromosome abnormalities including females wtih triple X syndrome.

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