What is Klinefelter syndrome, variants?
• Klinefelter syndrome, variants: A genetic condition where males have at least one extra X chromosome or extra copies of both the X and Y chromosomes in each cell. Normally male cells contain one X and one Y chromosome in each cell. The condition is not inherited but is a result of problems during cell division. Klinefelter syndrome, variants is listed as a “rare disease” by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Klinefelter syndrome, variants, or a subtype of Klinefelter syndrome, variants, affects less than 200,000 people in the US population.
