Sex hormones in male psoriasis patients and their correlation with the Psoriasis Area and Severity Index

Modulation of psoriasis severity by estradiol during pregnancy, menstruation and menopause has been investigated previously. The correlation between sex hormones and Psoriasis Area Severity Index (PASI) has not been studied in male psoriasis patients. We investigated serum sex hormones in male psoriasis patients compared with healthy controls and correlated these findings with PASI. Estradiol, testosterone, follicle‐stimulating hormone (FSH) and luteinizing hormone (LH) levels were measured in 47 male patients with psoriasis and 20 healthy controls. Patients with psoriasis showed higher body mass index and higher serum levels of FSH and LH relative to healthy controls, although this difference was not statistically significant. However, serum levels of testosterone and estradiol were significantly different between patients with psoriasis and healthy controls. Testosterone was significantly increased in control patients and estradiol was significantly increased among psoriatic patients. A significant inverse correlation was found between estradiol and PASI. Although the role of sex hormones in the pathogenesis of psoriasis has not been demonstrated, this is the first report of an inverse correlation between estradiol and PASI in male patients.