Warthin tumor of parotid
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Palpable lump right parotid. Previously biopsied in 2008 - Warthin tumor. The patient elected not to have removed. Now increasing size.
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Well defined ovoid hypoechoic mass in the parotid. Usually a pleomorphic adenoma but in this case a Warthin tumor (adenolymphoma). The patient did not have surgery so this case shows the natural history ie very slow-growing tumor prone to multifocality (including bilaterality but not in this case). A second lesion with similar imaging characteristics has developed in the same gland.