ASCL1 and small cell lung carcinoma: Indeed, different subtypes of SCLC are identified based on specific transcription factors transcription, such as ASCL1 (SCLC-A), NEUROD1 (SCLC-N), POUF23 (SCLC-P), YAP1 (SCLC-Y), and a recent acknowledged inflammatory/immune-related gene expression subtype SCLC-I subtype [120].