MYC and carcinoma: However, squamous metaplasia was also identified in some MMTV-associated (7 of 9) and Wnt1-induced (12 of 13) type P tumors, Myc-induced carcinomas (7 of 19), adenomyoepitheliomas (3 of 5), and spontaneous carcinomas exhibiting EMT (1 of 4).