MUC16 and cancer: Blood tests were performed, and serum CA-125 levels were increased to 1644.5 IU/mL (normal range: 5–35 IU/mL), whereas serum levels of other cancer antigens like CA 19-9, CA 15-3, carcinoembryonic antigen (CEA), alpha-fetoprotein (AFP), and Inhibin B were into the normal range.