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. The gene discussed is CDKN2A; the disease is non-small cell lung carcinoma.