title: [Clinical polymorphism of the XYY syndrome].
abstract: The XYY syndrome presents with a wide variation in the clinical features, both of the physical and behavioral nature. We report two new cases which illustrate this statement. The first case presented with aggressive behaviour and cryptorchidism. The second case was associated with pathological short height, pubertal delay and cardiac features (extrasystoles and short PR interval). We revise some of the aspects of XYY syndrome.
authors.affiliation: Unidad de Endocrinología Infantil, Hospital Clínico Universitario, Salamanca.
authors.forename: M A
authors.initials: MA
authors.lastname: Diego Nuñez
authors.forename: J
authors.initials: J
authors.lastname: Prieto Veiga
authors.forename: F
authors.initials: F
authors.lastname: Rey Sánchez
authors.forename: J F
authors.initials: JF
authors.lastname: Salazar Veloz
authors.forename: J
authors.initials: J
authors.lastname: De Manueles Jiménez
authors.forename: J
authors.initials: J
authors.lastname: Santos Borbujo
authors.forename: A
authors.initials: A
authors.lastname: Martín Ruano
authors.forename: E
authors.initials: E
authors.lastname: Alvarez Aparicio
authors.forename: J
authors.initials: J
authors.lastname: Cedeño Montaño
mesh_terms: D000293:Adolescent; D000374:Aggression; D001827:Body Height; D005117:Cardiac Complexes, Premature; D002648:Child; D003456:Cryptorchidism; D006801:Humans; D006948:Hyperkinesis; D008297:Male; D011110:Polymorphism, Genetic; D011628:Puberty, Delayed; D012729:Sex Chromosome Aberrations / Q000235:genetics* / Q000503:physiopathology / Q000523:psychology; D013577:Syndrome; D014997:XYY Karyotype / Q000235:genetics*