In fact, several cytokines that are known to be key players in the pathogenesis of psoriasis, such as tumor necrosis factor- (TNF-) alpha, interleukin- (IL-) 2, IL-6, and IL-17, are also found to be at an increased concentration in the aqueous humor of patients with uveitis [23, 24]. This evidence concerns the gene IL6 and psoriasis.