title: The 49,XXXXY syndrome. Clinical and psychological follow-up data.
abstract: In this report we give a detailed description of the clinical and psychological follow-up data of three young 49,XXXXY males, paying special attention to changes in intellectual performance and behaviour at different ages.
authors.affiliation: Department of Human Biology U.Z. Gasthuisberg, Leuven, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Borghgraef
authors.forename: J P
authors.initials: JP
authors.lastname: Fryns
authors.forename: E
authors.initials: E
authors.lastname: Smeets
authors.forename: J
authors.initials: J
authors.lastname: Marien
authors.forename: H
authors.initials: H
authors.lastname: van Den Berghe
mesh_terms: D005500:Follow-Up Studies; D006801:Humans; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000235:genetics* / Q000503:physiopathology / Q000523:psychology; D007621:Karyotyping; D008297:Male; D011596:Psychomotor Disorders / Q000235:genetics / Q000503:physiopathology / Q000523:psychology; D012729:Sex Chromosome Aberrations / Q000503:physiopathology / Q000523:psychology*; D014960:X Chromosome