Klinefelter syndrome
Psychological and behavioural characteristics
The information below has been drawn up by Dr A Kuczynski, Child Clinical Psychologist, South London & Maudsley NHS Trust, London, UK and Dr O Udwin, Consultant Clinical Child Psychologist, West London Mental Health NHS Trust, London, UK. It has also been approved by the Society for the Study of Behavioural Phenotypes.

As pointed out above, many individuals with the syndrome may be
relatively unaffected. Current knowledge may emphasise the more obvious
problems in some cases of the syndrome, rather than those who develop
comparatively normally.
That said, it is thought that affected individuals are more susceptible to learning problems than the general population, especially in the areas of early speech delay, persistent language difficulties, and difficulties in reading and writing.
Children with the syndrome have been described as relatively placid and compliant. The combination of learning difficulties and abnormal development of sexual characteristics can contribute to low self-esteem and individuals may experience social difficulties in adolescence and adulthood, varying from withdrawal to aggression.
What are the symptoms?
| What are the causes? ![]()