ENO2 and small cell lung carcinoma: The sensitivity, specificity, positive likelihood ratio, negative likelihood ratio and diagnostic odds ratio of ProGRP in the diagnosis of SCLC were 0.70, 0.93, 11.57, 0.32 and 36.45, and as for NSE those were 0.61, 0.90, 5.67, 0.45 and 13.08, respectively.