Klinefelter Syndrome
Definition
Klinefelter syndrome is a chromosome disorder in males. People with this condition are born with at least one extra X chromosome.
Description
Klinefelter syndrome is a condition where one or more extra X-chromosomes are present in a male. Boys with this condition appear normal at birth. They enter puberty normally, but by mid puberty have low levels of testosterone causing small testicles and the inability to make sperm. Affected males may also have learning disabilities and behavior problems such as shyness and immaturity and an increased risk for certain other health problems.
Klinefelter syndrome is one of the most common chromosomal abnormalities. About 1 in every 500 to 800 males is born with this disorder. Approximately 3% of the infertile male population have Klinefelter syndrome.
Causes and symptoms
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