Correlation between ASCL1 expression positivity and OS was reported to be insignificant in their cohort (n = 95) of both pure SCLC and combined SCLC of TNM stage I–III, in patients with only pure SCLC (n = 41), as well as in patients TNM stage I and II (n = 84, P = 0.139). This evidence concerns the gene ASCL1 and small cell lung carcinoma.