Klinefelter Syndrome Support - Educational and support information about Klinefelter Syndrome/XXY and its variants. 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. Genetic Org Home - Information about Klinefelter Syndrome, when it was first discovered, the common characteristics, and treatment. American Association for Klinefelter Syndrome Information and Support (AAKSIS) - Email list, conference, membership, newsletter, regional groups and resource links. 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. Klinefelter Syndrome - Overview and medical information. MedlinePlus Medical Encyclopedia: Klinefelter Syndrome - Defines this condition, the causes, symptoms, treatment, prognosis, and complications.