title: Cytogenetic studies in mental retardation with report of a case of XXXXY variant of Klinefelter's syndrome.
mesh_terms: D002648:Child; D002675:Child, Preschool; D003582:Cytogenetics; D004314:Down Syndrome / Q000235:genetics; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000235:genetics*; D008297:Male; D014424:Turner Syndrome / Q000235:genetics