ENO2 and lung cancer: Furthermore, the specificities of the five thyroid function markers (TSH, TT3, TT4, FT3, and FT4) were 52.1%, 83.61%, 85.3%, 76.1%, and 69.33%, respectively, and the specificities of the four traditional lung cancer markers (CEA, NSE, SCC, and CYF) were 88.6%, 98.3%, 100%, and 99.2%, respectively.