ETV6 and acinar cell carcinoma: MASC of salivary glands was first described as a distinct tumor syndrome in 2010 by Skalova et al. (2010).4 Genetically, MASC is characterized by a t(12;15)(p13;q25) ETV6-NTRK3 gene translocation that is also shared by secretory carcinoma of the breast, collectively termed SC.2,5 Before being distinguished as a separate entity, MASC tumors were erroneously miscategorized as other salivary gland neoplasms, such as acinic cell carcinoma and adenocarcinoma.