mosaic Klinefelter syndrome 47,XXY/46,XY mosaic Klinefelter syndrome http://purl.bioontology.org/ontology/SNOMEDCT/205700008 47,XXY/46,XY mosaic Klinefelter's syndrome 47,XXY/46,XY syndrome A mosaic variant of Klinefelter syndrome in which there is a mosaic 47,XXY/46,XY constitutional karyotype and varying degrees of spermatogenic failure. Klinefelter syndrome, XY/XXY mosaic Klinefelter's syndrome, XY/XXY mosaic 47,XXY/46,XY mosaicism 47,XXY/46,XY