MUC16 and neoplasm: However, tumor marker levels were as follows: cancer antigen 125 (CA125) 108.6 U/mL (reference range 0 to 30 U/mL), neuron-specific enolase (NSE) 19.1 ng/mL (reference range up to 16 ng/mL), α-fetoprotein (AFP) 1.4 ng/mL (reference range up to 10 ng/mL), and β-human chorionic gonadotropin (β-HCG) ≦0.1 ng/mL.