NCIt definition : A rare carcinoma that arises from the salivary gland and consists of at least two
histologically distinct types of carcinoma within the same topographic location. The
carcinoma components usually are adenoid cystic carcinoma, epithelial-myoepithelial
carcinoma, and/or salivary duct carcinoma. Adenoid cystic carcinoma is commonly the
predominant component.;