According to the results from 2 morning blood cortisol and adrenocorticotropic hormone (ACTH) (46.203 μg/dL for cortisol and 209.086 pg/mL for ACTH on the first day, >60 μg/dL for cortisol and 251.612 pg/mL for ACTH on the second day), and elevated urinary 17-hydroxycorticosteroids, he was diagnosed as SCLC with PCS, ultimately. This evidence concerns the gene POMC and small cell lung carcinoma.