Mammary Analogue Secretory Carcinoma of the Parotid Gland

Objective Mammary analogue secretory carcinoma is a new entity in salivary gland tumors that has only been recently described. It has overlapping histopathological features with acinic cell carcinoma and low grade variants of cystadenocarcinoma. It has a distinct chromosomal translocation, t(12;15)‐(p13;q25), resulting in a fusion gene ETV6 NTRK3. The clinical course of this disease entity is uncertain at present. We present a case of MASC of the parotid gland occurring in a 34‐year‐old man and discuss the difficulties in diagnosis and subsequent treatment of this tumour.