Warthin's tumor is a benign tumor. Malignant transformation is very rare and usually occurs to carcinoma, not to lymphoma. Lymphoma arising in salivary glands is a separate entity, often associated with Sjögren's syndrome, not with Warthin's tumor | Warthin's tumor occurs in the parotid tail, is associated with smoking, can be bilateral, and appears hot on technetium scan due to oncocytic cells rich in mitochondria | When malignant transformation is suspected (rapid growth, pain, facial paralysis), consult a head and neck surgeon for biopsy and surgical planning | The presence of Warthin's tumor in a patient with generalized lymphadenopathy changes the answer to the need to exclude separate lymphoma | On MRI, Warthin's tumor appears as a multicystic lesion with high T2 signal | Salivary Gland Disorders -Myers new.pdf — p. 174