Mutually exclusive amplification of the three MYC family genes and the concurrent expression of two or three MYC family genes together, even though only one of them is amplified [14], imply the convenience of a common suppressing agent to all MYC proteins, MYC, MYCL and MYCN, to inhibit the growth of SCLC cells by MYC inhibition. This evidence concerns the gene MYCN and small cell lung carcinoma.