Klinefelter se sindroom klinefelters syndrom Klinefelter syndrome Klinefelters syndrome 47,XXY syndrome 758.7 http://purl.bioontology.org/ontology/MEDDRA/10056894 http://purl.bioontology.org/ontology/SNOMEDCT/405769009 Q98.0 47 XXY syndrome 47, XXY syndrome A chromosomal syndrome caused by the presence of an extra X chromosome in the male karyotype. Affected individuals are infertile and have a small penis and testes. They tend to have tall stature and long legs and may have difficulties with speech and language development. Gynecomastia may be present. Klinefelter syndrome karyotype 47, XXY Klinefelter syndrome, XXY Klinefelter's syndrome karyotype 47 XXY Klinefelter's syndrome, XXY XXY Klinefelter's syndrome XXY syndrome chromosome XXY syndrome classical Klinefelter syndrome 47,XXY The Complete Dictionary of Sexology