Studies of genomic imbalances and the MYB-NFIB gene fusion in polymorphous             low-grade adenocarcinoma of the head and neck..     ///    "RT-PCR analysis             revealed that one of the 9 PLGAs expressed the ACC-associated MYB-NFIB gene fusion,             illustrating the diagnostic difficulties associated with the diagnosis of these             morphologically partly overlapping entities. "    ///    Because of the well-known morphologic             similarities between PLGA and adenoid cystic carcinoma (ACC) we also analyzed             all tumors for expression of the recently identified ACC-associated MYB-NFIB gene             fusion. 