Which of the following tumors is an unencapsulated, infiltrating tumor composed of a combination of mucous cells interspersed with squamous-like epithelial cells?

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Mucoepidermoid carcinoma is an unencapsulated, infiltrating tumor composed of a combination of mucous cells interspersed with squamous-like epithelial cells. Adenoid cystic carcinoma is made up of ductal and myoepithelial cells forming glandular and cribriform arrangements. Monomorphic adenoma and pleomorphic adenoma are benign tumors composed of a single type of cell (either ductal or myoepithelial cells) or a mixture of cells (primarily ductal and myoepithelial cells), respectively.

Which of the Following Tumors Is an Unencapsulated, Infiltrating Tumor