Small Cell Lung Cancer (SCLC) can be classified into molecular subtypes based on the expression of key transcription factors, leading to the identification of SCLC-A (high expression of the transcription factor ASCL1), SCLC-N (high expression of NEUROD1), SCLC-Y (high expression of the transcription factor YAP1), and SCLC-P (high expression of POU2F3) subtypes [39]. This evidence concerns the gene POU2F3 and small cell lung carcinoma.