A possible behavioural and cognitive phenotype for the 47,XYY karyotype in a pre-pubertal child.
OBJECTIVE
The aim of this study was to describe the case of a 9-year-old boy with 47,XYY genotype and possible behavioural phenotype involving 'internalizing' and 'externalizing' symptoms and cognitive phenotype of deficient spatial memory.


CONCLUSIONS
Longitudinal study of 47,XYY cases recognized prenatally are needed to confirm the preliminary findings described in this report.
Davey
Chris
C
Academic Child Psychiatry Unit, Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Murdoch Children's Research Institute, Parkville, Vic, Australia.
Vance
Alasdair
A
D002648:Child; D002653:Child Behavior Disorders / Q000175:diagnosis / Q000235:genetics*; D003072:Cognition Disorders / Q000175:diagnosis / Q000235:genetics*; D005838:Genotype; D006801:Humans; D008297:Male; D008569:Memory Disorders / Q000175:diagnosis / Q000235:genetics; D009483:Neuropsychological Tests; D010641:Phenotype; D012720:Severity of Illness Index; D014997:XYY Karyotype