SELP and psoriasis: It has been reported that increased polymorphonuclear neutrophil infiltration of PCT in psoriasis is associated with PLT surface antigens, and P-selectin can increase PLT and WBC aggregation in mouse skin by being highly expressed on the PLT surface [28]. As reported in other studies in our study, PLT and PCT, which we found increased compared to controls, support the view that platelets play a role in the pathogenesis of psoriasis [29]. PLR is also associated with chronic inflammatory diseases such as NLR [26].