CDKN2A and neoplasm: Chromosomal deletions in the 9p21 (CDKN2A gene) and 12q12-q13 (NAB2, ERBB3 genes encoding for keratins/type I and II) regions present a high incidence on subtypes of biphasic (epithelial/myoepithelial) nature, such as adenoid cystic carcinomas (ACCs) [6], and along with alterations in MYB gene expression may confer to the proliferative, differentiative, and apoptotic properties of tumor cells [7].