syndrome usually is not diagnosed before the preteen years because there are no
symptoms or because symptoms go unnoticed until puberty. But a doctor may
suspect Klinefelter syndrome when a young boy has difficulty learning to talk,
read, or write.
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During puberty, some males may be suspected of
having Klinefelter syndrome, including those who:
Are taller than other males in their family
and have long legs.
Have small testicles that do not increase in
size as puberty progresses.
Have enlarged breast tissue that
persists for more than 2 years.
Have learning or social problems
(such as lacking self-confidence and being shy, immature, or
Have mild mental retardation. Klinefelter syndrome is
present in about 1 out of 100 males who have mental retardation.3
Tests for Klinefelter syndrome during childhood or
puberty usually include a medical history, physical exam, and karyotype.
Klinefelter syndrome may not be
diagnosed until adulthood when a man seeks medical care to find out the cause
infertility. About 3 out of 100 infertile men have
Klinefelter syndrome.4 Tests include a medical
history, physical exam, and karyotype. A man may also have hormone tests and a
WebMD Medical Reference from Healthwise
February 13, 2009
This information is not intended to replace the advice of a doctor.
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