title: An XXYY male presenting with aggression: a case report.
abstract: An abnormally tall 21-year-old Caucasoid male was referred for psychiatric assessment for pathological aggression and mental subnormality. He showed many of the phenotypic features of Klinefelter's syndrome. Cytogenetic studies revealed a 48,XXYY karyotype. The significance of the association of this karyotype with aggressive behaviour is discussed.
mesh_terms: D000328:Adult; D000374:Aggression; D001827:Body Height; D006801:Humans; D008297:Male; D012729:Sex Chromosome Aberrations / Q000175:diagnosis / Q000235:genetics; D012730:Sex Chromosomes