WFDC2 and neoplasm: Such serum molecular biomarkers employed to diagnose and follow-up patients suffering from OC are carbohydrate antigen 199, carcinoembryonic antigen, fetal alpha protein, human epididymis protein 4 (HE-4), and cancer antigen 125 (CA-125).[5,6] Additionally, they can be utilized to monitor tumor relapse or progression.