FABP5 and obesity due to melanocortin 4 receptor deficiency: The presented results point out two important informations for clinicians: first that psoriatic patients even without obesity have metabolic disturbances and should be screened for them, and second, even more important: that during our present study, after NB-UVB treatment we have observed decrease of serum FABP5 concentration which may have influence on metabolic status of psoriatic patients.