Patients with Klinefelter and triple X syndromes show an increased prevalence of SLE and Sjögren disease, likely due to the synergistic interaction of the extra X chromosomes.

Created with Sketch. Also known as XXY syndrome, this rare condition occurs when male babies are born with an extra X chromosome. These individuals tend to have smaller genitalia, extreme shyness ...

Klinefelter syndrome, also known as XXY syndrome, is the result of an extra X chromosome in people assigned male at birth. It is associated with high rates of sterility and sexual dysfunction.

“We have thought that the X chromosome had something to do with the autoimmune ... or an offshoot called CREST syndrome.” Autoantibody markers that help narrow the diagnosis could better equip doctors ...

For those with Klinefelter syndrome, this painful reality is a constant struggle. How does an extra X chromosome lead to infertility in men? Professor Qiao Jie and her team at Peking University ...