In terms of molecular pattern, LCNEC presents as a distinct subgroup of lung cancer, which could be categorized into “type I LCNEC” and “type II LCNEC”: type I LCNEC shares similar genomic alterations (STK11/KEAP1 alterations) with other types of NSCLC, while the transcriptional characteristics and neuroendocrine profile are shown more resemblance to SCLC. This evidence concerns the gene STK11 and large cell neuroendocrine carcinoma.