Metabolic syndrome may be an important comorbidity in patients with seborrheic dermatitis

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Introduction: Seborrheic dermatitis is a chronic inflammatory skin disease. One of the components of metabolic syndrome is inflammation, and many inflammatory cytokines play a critical role in the disease. The aim of this study is to investigate metabolic syndrome and to evaluate the relationship between the parameters of the disease and disease severity in patients with seborrheic dermatitis. Material and methods: Forty-seven patients with seborrheic dermatitis and 36 healthy controls were included in the study. The parameters of metabolic syndrome were recorded in both groups. In the patient group, disease severity was determined with the seborrheic dermatitis area and severity index (SDASI). All the venous blood samples were taken at 8 a.m. after 10 h of fasting. Results: High-density lipoprotein (HDL) levels in the patient group were statistically significantly lower than in the controls. There was no significant difference between groups according to other parameters. In terms of history of metabolic disease in first degree relatives (diabetes mellitus, cardiovascular disease, and dyslipidaemia), 78.7% of those in the patient group (n = 37) and 55.6% of those in the control group (n = 20) had a history of metabolic disease in their families, and the difference between the patient and control groups was found to be statistically significant (p < 0.05). There was a significant correlation between disease severity and plasma HDL levels (p = 0.033, r = –0.312). Conclusions: The presence of seborrheic dermatitis may be a predictive factor for metabolic syndrome.