Klinefelter syndrome


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Related to Klinefelter syndrome: Turner syndrome, cri-du-chat syndrome
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Synonyms for Klinefelter syndrome

syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation

References in periodicals archive ?
Mark and his parents learned that Klinefelter syndrome (47,XXY) is the most common of the sex chromosome aneuploidy conditions.
While Klinefelter syndrome is observed in one of 650 male births, the incidence of 48,XXYY syndrome has been calculated to be 1/18 000-1/40 000.
Physician consultation and dose adjustment are very important in managing the use of oxandrolone in boys with Klinefelter syndrome," Dr.
Small, firm testes are suggestive of dysgenetic gonads found in patients with Klinefelter syndrome (47 XXY), whereas small, soft testes suggest secondary hypogonadism.
Radiation exposure and diseases that increase estrogen levels, such as liver cirrhosis or the genetic disorder Klinefelter syndrome, are among the factors that raise a man's risk.
It explains puberty, body image, gender and gender identity, sexual attraction and orientation, and sexual relationships; protecting sexual health, risky behaviors, abuse and rape, online sexual predators, and virginity; specific topics for girls, including reproduction, menstruation, breast health, when to see a gynecologist, the HPV vaccine, contraceptives, and infections and diseases like endometriosis and developmental disorders; topics for boys, such as circumcision, priapism, penile and testicular cancer, testicular exams, Klinefelter syndrome, and gynecomastia; pregnancy prevention and birth control methods; and sexually transmitted diseases, including HIV.
The chromosomes in a patient showing both mongolism and the Klinefelter syndrome.
Researchers from Andrology Australia and the Murdoch Children's Research Institute said that up to half of those afflicted by Klinefelter syndrome - a genetic condition caused by an extra X chromosome - do not know they have it, reports the Sydney Morning Herald.
For example, a tall child of tall parents will have normal upper and lower segments, as well as arm span, whereas a child with tall stature due to a disease condition such as Klinefelter syndrome will have an increased arm span.
Klinefelter syndrome, a genetic condition that can also cause gynecomastia, or male breast enlargement, has also been suggested, but Braverman said he suspects familial gynecomastia, a hereditary condition that leads to the overproduction of estrogen.
Acromegaly, Lawrence-Seip syndrome, gonadal dysgenesis, Klinefelter syndrome, Turner syndrome, and Prader-Willi syndrome are among those conditions that can contribute.
Klinefelter syndrome affects about one in 1,000 men.