Klinefelter-syndrome Sentence Examples
By mid-puberty, boys with Klinefelter syndrome have low levels of testosterone, resulting in small testicles and the inability to make sperm.
Approximately 3% of the infertile male population have Klinefelter syndrome.
Most commonly, a male with Klinefelter syndrome will be born with 47 chromosomes in each cell, rather than the normal number of 46.
Because people with Klinefelter syndrome have a Y chromosome, they are all male.
Approximately 1/3 of all males with Klinefelter syndrome have other chromosome changes involving an extra X chromosome.Advertisement
Mosaic Klinefelter syndrome occurs when some of the cells in the body have an extra X chromosome and the other have normal male chromosomes.
These males can have the same or milder symptoms than those with non-mosaic Klinefelter syndrome.
The risk of Klinefelter syndrome reoccurring in another pregnancy for a woman who had a son with Klinefelter syndrome is not increased above the risk of the general population.
The symptoms of Klinefelter syndrome are variable; not every affected person will have all of the features of the condition.
Males with Klinefelter syndrome appear normal at birth and have normal male genitalia.Advertisement
From childhood, males with Klinefelter syndrome are taller than average with long limbs.
Many males with Klinefelter syndrome have poor upper body strength and can be clumsy.
Approximately 1/3 of males with Klinefelter syndrome have breast growth, some requiring breast reduction surgery.
With rare exception, men with Klinefelter syndrome are infertile because they cannot make sperm.
While it was once believed that all boys with Klinefelter syndrome were mentally retarded, doctors now know that the disorder can exist without retardation.Advertisement
However, children with Klinefelter syndrome frequently have difficulty with language, including learning to speak, read, and write.
Approximately 50% of males with Klinefelter syndrome are dyslexic.
Some people with Klinefelter syndrome have difficulty with social skills and tend to be more shy, anxious, or immature than their peers.
Some people with Klinefelter syndrome can also have anxiety, nervousness and/or depression.
Taurodontism, an enlargement of the pulp of the teeth with surface thinning, is very common in Klinefelter syndrome and can be diagnosed with dental x rays.Advertisement
Diagnosis of Klinefelter syndrome is confirmed by examining chromosomes for evidence of more than one X chromosome present in a male.
Usually these procedures are done for a reason other than diagnosing Klinefelter syndrome.
If the diagnosis of Klinefelter syndrome is suspected in a young boy or adult male, chromosome testing can also be on a small blood or skin sample after birth.
Children with Klinefelter syndrome may benefit from a speech therapist for speech problems or other educational intervention for learning disabilities.
While many men with Klinefelter syndrome live normal lives, nearly 100 percent of these men will be sterile (unable to produce a child).Advertisement
However, a few men with Klinefelter syndrome have been reported who have fathered a child through the use of assisted fertility services.