Proprotein convertase subtilisin/kexin type 9 (PCSK9), a member of the proprotein convertases family whose essential role in the pathogenesis of atherosclerosis had been initially attributed to the regulation of cholesterol metabolism, according to data from recent years, appeared to also be an important factor in thrombus and plaque formation as well as a regulator of platelet function [8,9]. Here, PCSK9 is linked to atherosclerosis.