Mammary analog secretory carcinoma (MASC) is a newly described carcinoma of the salivary glands.
MASC is characterized by morphologic and immunohistochemical features that strongly resemble a secretory carcinoma (SC) of the breast.
MASC and SC of the breast share the presence of translocation t(12;15) (p13;q25), that results in the formation of an oncogenic fusion gene ETV6-NTK3.
The majority of MASC present among men and arise from the parotid gland.
MASC is a low-grade carcinoma with potential for high-grade transformation.