IL17A and obesity due to melanocortin 4 receptor deficiency: A recent prospective study has demonstrated that overweight and obese patients had a better Disease Activity in Psoriatic Arthritis (DAPSA) score compared with their normo-weight counterparts (78), and serum IL-17 seem to correlate BMI, pointing to an association between obesity and IL-17 and thus, a potential better clinical benefit in patients with obesity.