MUC16 and neoplasm: All available tumor markers, including the a-fetoprotein (AFP), beta-human chorionic gonadotropin (β-hCG), Lactate Dehydrogenase (LDH), Carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA19-9) or cancer antigen 125 (CA125), were negative preoperatively.