Finally, other possible candidate proteins as BC molecular markers have been reported in a recent proteomic analysis [130], the most promising of which are apolipoprotein E (APOE), leucine-rich alpha-2-glycoprotein (LRG1) and, above all, fibrinogen beta chain precursor (FGB) and alpha-1 antitrypsin (SERPINA1). Here, APOE is linked to breast cancer.