What Causes Klinefelter Syndrome? What is Klinefelter Syndrome?, When is Klinefelter syndrome diagnosed? We have compiled some information about it. What Causes Klinefelter Syndrome? What is Klinefelter Syndrome? Klinefelter syndrome, which occurs due to a chromosomal disorder, is also known as XXY syndrome. In the content of our article, you, our valued friends, can find…