CDKN2A and small cell lung carcinoma: The six most prominent regions, according to the multinomial model, that discriminate NSCLC from SCLC are located at chromosome arm 1p (e.g., MYCL1), 3p (e.g., FHIT), 9p (e.g., CDKN2A), 16q, 19p (e.g., STK11), and chromosome 22.