Additional laboratory tests—including 17α-hydroxyprogesterone, thyroid function, and tumor markers such as cancer antigen 125 (CA-125), cancer antigen 199 (CA-199), carcinoembryonic antigen (CEA), neuron-specific enolase (NSE), β-subunit of human chorionic gonadotropin (β-hCG), and alpha-fetoprotein (AFP)—were all within normal limits. Here, ENO2 is linked to neoplasm.