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
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.
Should nonmosaic Klinefelter syndrome
men be labelled as infertile in 2009.
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.
However, no abnormal karyotype was obtained from the lymphocytes in our patient, and he did not have the characteristics of Klinefelter syndrome
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.
, 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.
affects about one in 1,000 men.
Lower rates of pregnancy termination for prenatlly diagnosed Klinefelter syndrome
and other sex chromosome polysomies.