title: [XYY syndrome (diplo-Y syndrome)].
abstract: A case is reported of a 12-year-old boy with the XYY syndrome and unusual clinical symptoms. In addition, past research on the XYY syndrome and the current state of knowledge is reviewed, with special emphasis on psychopathology, psychiatry and genetic counseling.
mesh_terms: D002648:Child; D002653:Child Behavior Disorders / Q000175:diagnosis; D003415:Crime; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis; D008297:Male; D010641:Phenotype; D012729:Sex Chromosome Aberrations / Q000175:diagnosis*; D013577:Syndrome; D014997:XYY Karyotype / Q000175:diagnosis* / Q000523:psychology
vernacular_title: Das XYY-Syndrom (Diplo-Y-Syndrom).