It is well known that the frequency of cardiometabolic diseases are increased in patients with Klinefelter Syndrome. The triglyceride-glucose index (TyG index) is a simple surrogate marker of insulin resistance and is also associated with various cardiometabolic diseases. The aim of this study to investigate the TyG index levels and its relationship with insulin resistance and endothelial dysfunction in patients with KS.

From the patient database of our Endocrinology department we randomly included a total of 30 patients with KS and 32 healthy controls in the study. All the recorded data in the database were registered under the approval of Local Ethical Committee of Gulhane School of Medicine.

The clinical and laboratory parameters, TyG index, asymmetric dimethylarginine (ADMA), homeostatic model assessment of insulin resistance (HOMA-IR) and high-sensitivity C-reactive protein (hs-CRP) levels were gathered from the database and the triglyceride-glucose index was calculated by the help of pre-measured laboratory parameters.

Inclusion Criteria:

• Patients with a verified Klifelter Syndrome karyotype (all subjects included were 47, XXY) and who were not previously given testosterone replacement.

Exclusion Criteria:

• age <18 years,
• acute infection, malignancy, any visceral organ dysfunction, nutritional derangements, clinical history of cardiovascular disease, cerebrovascular disease, drug use such as antidiabetic or lipid-lowering medications, or those lacking complete clinical data.

We had a patient database consisting of male patients with Klinefelter syndrome

A total of 30 male patients with treatment-naive Klinefelter syndrome and 30 control subjects without any chronic disease