Klinefelter syndrome Treatment and Symptoms 47,XXY; XXY syndrome; XXY trisomy
Klinefelter syndrome is a chromosomal condition that affects male sexual development. Most males with Klinefelter syndrome have one extra copy of the X chromosome in each cell. Some males with the condition have low levels of the hormone testosterone beginning during puberty, which can lead to breast development (gynecomastia) and an increased risk of breast cancer, reduced facial and body hair, and an inability to father children (infertility). Boys with Klinefelter syndrome may also have difficulty with speech and language development. Variants of Klinefelter syndrome, which involve more than one extra X chromosome or extra copies of both sex chromosomes in each cell, tend to have more severe signs and symptoms. These disorders affect male sexual development but may also include decreased IQ, distinctive facial features, skeletal abnormalities, poor coordination, and more severe problems with speech.
... Klinefelter syndrome is a chromosomal condition that affects male sexual development. Most males with Klinefelter syndrome have one extra copy of the X chromosome in each cell. Some males with the condition have low levels of the hormone testosterone beginning during puberty, which can lead to breast development (gynecomastia) and an increased risk of breast cancer, reduced facial and body hair, and an inability to father children (infertility). Boys with Klinefelter syndrome may also have difficulty with speech and language development.
Variants of Klinefelter syndrome, which involve more than one extra X chromosome or extra copies of both sex chromosomes in each cell, tend to have more severe signs and symptoms. These disorders affect male sexual development but may also include decreased IQ, distinctive facial features, skeletal abnormalities, poor coordination, and more severe problems with speech. ...
Klinefelter's syndrome is a condition caused by a chromosome nondisjunction ...
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Understanding Klinefelter Syndrome: A Guide
for XXY Males and Their Families
... What is Klinefelter Syndrome? In 1942, Dr. Harry Klinefelter and his coworkers at the Massachusetts General Hospital in Boston published a report about nine men who had enlarged breasts, sparse facial...
Source: Cleveland Clinic
Klinefelter syndrome ... Klinefelter syndrome is a chromosomal condition that affects male sexual development. Most males with Klinefelter syndrome have one extra copy of the X chromosome in each cell. Some males with the con...
Source: Genetics Home Reference
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Klinefelter syndrome Articles
- Klinefelter syndrome
... Klinefelter syndrome is a chromosomal condition that affects male sexual development. Most males with Klinefelter syndrome have one extra copy of the X chromosome in each cell. Some males with the con...
Resources
- Genetics Home Reference: Klinefelter syndrome (Genetics Home Reference)
- Klinefelter Syndrome (Cleveland Clinic)