NTRK3 mutation in secretory carcinoma of the parotid gland: A Case report

Abstract Mammary analog secretory carcinoma (MASC) is a newly described carcinoma with a molecular hallmark of ETV6‐NTRK3 fusion that promotes oncogenesis. While MASC histopathology was well‐studied in the literature, clinical behavior remains unstudied. We present a 22‐year‐old man with painless parotid mass, which was diagnosed as salivary gland cancer, MASC subtype.