• rare, benign tumor exclusively of oncocytic cells (1% of salivary gland tumors)
• rare "malignant" low-grade tumor transformation
• SSx: slow growing, painless mass
• Dx: surgical biopsy (parotidectomy), radiosialography (concentrates technetium-99m due to the presence of high mitochondrial content of oncocytes), FNA
• Rx: superficial or deep parotidectomy (see below)
• oncocytic cells (see Warthin's tumor)
• granularity from mitochondria
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