label: Salivary Gland Oncocytoma
label_lc: salivary gland oncocytoma
description: "A rare benign epithelial neoplasm composed of oncocytes, which are large cells with a large amount of granular eosinophilic cytoplasm containing numerous tightly-packed mitochondria.  Approximately 85% to 90% occur in the parotid gland; most of the remainder occur in the submandibular gland. The peak incidence is in the seventh through ninth decades of life. In almost all cases, swelling is the only complaint of the patient."