Which salivary gland tumor is characterized histologically by a double-layered epithelial cell arrangement supported by a reactive lymphoid stroma?

Explanation

Warthin tumor is distinguished by its histological appearance of a bilayered epithelium resting on a lymphoid stroma that shows reactive changes. This feature helps differentiate it from other salivary gland neoplasms such as pleomorphic adenoma, mucoepidermoid carcinoma, and acinic cell carcinoma.