Bilateral and multifocal Warthin's tumors of parotid glands: PET/CT imaging.

Unilateral hypermetabolic lesion of parotid gland demonstrated on PET/CT imaging may originate from a large spectrum of benign or malignant processes, such as adenoma, Warthin's tumor, oncocytic neoplasm, lymphoma, and primary or secondary malignancy of the gland. Bilateral and multifocal parotid gland disease is less common but possible because of the known characteristics of Warthin's tumors. The authors present such a case that was incidentally documented during PET/CT evaluation of solitary pulmonary nodule.