[Patient with testosterone deficit syndrome and dyslipemia]. / Paciente con SDT y dislipemia.

We define dyslipemia as the abnormally elevated presence of lipids in the blood. The main ones are hypercholesterolemia (cholesterol over 240 mg/dl), hypertrigliceridemia (triglicerides level over 200 mg/dl) and hipo-alphalipoproteinemia (High density lipoproteins,also called HDL Cholesterol, below 40 mg/dl). The presence of excessive lipids contributes to arteriosclerosis and they are an independent cardiovascular risk factor. It may be primary, if they have genetic origin and they are not associated with other diseases, but in most cases they are secondary to other pathological entities such as diabetes, hypothyroidism, obesity and metabolic syndrome (MS). In our current society, sedentary lifestyle and unadequatelly hypercaloric diets are making obesity and MS prevalences grow, and their relation to dyslipemias has become tighter. Obesity is related with all the criteria for MS. But obesity is not at all synonymous of MS. On the one hand neither fat distribution is the same in all individualas nor confers the same risk. Accordingly, we know that abdominal localization of fat is related to higher intensity of insulin resistance (IR) and MS. On the other hand, it seems that certain components of MS are determined by genetic factors, since there are morbid obese persons that are metabolically healthy and other patients develop insulin resistance without obesity. So that, it seems that the excess in visceral adiposity in the presence of certain genetic factors would be the most related cause of the appearance of peripheral insulin resistance and diabetes mellitus, hyperlipidemia (increase of very low density pipoproteins (VLDL), decrease of highdensity lipoproteins (HDL) arterial hypertension, and hypogonadotropic hypogonadism, composing what we call metabolic syndrome. In this scenario, we urologists are being first-hand witnesses.On the one hand, and in relation with cardiovascular risk factors, we know that all of them, and independently,not only can produce erectile dysfunction due to endothelial dysfunction, but also it generally appears years before the cardiovascular event. On the other hand, and in relation to the hypogonadotropic hypogonadism of patients with MS, we urologists may contributein greatly to the detection of patients with MS whose only symptom is erectile dysfunction or diminished libido, but specially we may play a key role in the improvement of these patients, since it is known that testosterone replacement therapy has a major potential to diminish or stop the progression of MS or its cardiovascular effects. Testosterone treatment not only improves the lipid profile, hypertension, insulin resistance, or reduces the abdominal circumference, but also it may help to get a better adherence to diet and exercise, so contributing to change unhealthy lifestyle habits whch are the origin of the problem.