In the patients with pemphigus, serum leptin concentrations were not associated with age (rs = −0.08, P = 0.58), height (rs = −0.22, P = 0.14), time until diagnosis (rs = 0.24, P = 0.10), body surface area affected (rs = 0.05, P = 0.73), PAAS-cutaneous score (rs = 0.05, P = 0.73), PAAS-mucus membrane score (rs = −0.02, P = 0.87), or PAAS-total score (rs = 0.06, P = 0.70). This evidence concerns the gene LEP and pemphigus.