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Klinefelter syndrome is not an inherited condition. The extra X chromosome comes from the mother in approximately 50% of the cases. Maternal age is the only known risk factor. Women at 40 years have a four-times-higher risk of a child with Klinefelter syndrome than women aged 24 years. [14] [34] [35]
Like women, males with Klinefelter syndrome also have two copies of the X chromosome, which may predispose them to increased risk of autoimmune disease through the same mechanism. [44] This risk is highest in autoimmune diseases which are female-predominant (e.g., Addison's disease, multiple sclerosis, Sjögren syndrome). [ 44 ]
Turner syndrome and Klinefelter syndrome. It is also one of the signs of CHARGE syndrome. Examples of acquired causes of hypogonadism: [citation needed] Opioid Induced Androgen Deficiency (resulting from the prolonged use of opioid class drugs, e.g. codeine, Dihydrocodeine, morphine, oxycodone, methadone, fentanyl, hydromorphone, etc.)
Klinefelter’s syndrome occurs when a man is born with one or more extra X chromosomes, leading to a variety of impacts that include underdeveloped testicles, impaired testosterone production ...
The term isolated GnRH deficiency (IGD) has increasingly been used to describe this group of conditions as it highlights the primary cause of these conditions and distinguishes them from other conditions such as Klinefelter syndrome or Turner syndrome which share some similar symptoms but have a different etiology. [29]
This includes patients with Turner Syndrome (45,X or 45,X0) and Klinefelter Syndrome (47,XXY) even though they do not generally present with atypical genitals. XX, Sex reversal: consist of two groups of patients with male phenotypes, the first with translocated Sex-determining region Y protein (SRY) and the second with no SRY gene.
The symptoms of Klinefelter's syndrome in a human male.. DSDs caused by chromosomal variation generally do not present with genital ambiguity. This includes sex chromosome DSDs such as Klinefelter syndrome, Turner syndrome and 45,X or 46,XY gonadal dysgenesis.
In humans with more than one X chromosome, the number of Barr bodies visible at interphase is always one fewer than the total number of X chromosomes. For example, people with Klinefelter syndrome (47, XXY) have a single Barr body, and people with a 47, XXX karyotype have two Barr bodies.