title: Pathologic and imaging findings of an oncocytoma in the deep lobe of the left parotid gland.
abstract: Oncocytoma is a rare salivary gland tumour consisting of oncocytes with many hyperplastic mitochondria. It usually occurs in the parotid gland. Because the features of oncocytoma resemble those of other benign and low-grade-malignant salivary gland tumours, clinical diagnosis is often challenging. This report presents the pathologic and imaging findings of an oncocytoma arising in the deep lobe of the left parotid gland in a 66-year-old man. Oncocytoma was diagnosed on the basis of histological, magnetic resonance imaging, and scintigraphic findings. The tumour showed accumulation of technetium-99m pertechnetate and decreased signal intensity on both T1- and T2-weighted magnetic resonance images.
authors.affiliation: Oral Surgery, Department of Oral Restitution, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Sakai
authors.forename: T
authors.initials: T
authors.lastname: Yoda
authors.forename: H
authors.initials: H
authors.lastname: Shimamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Hirano
authors.forename: M
authors.initials: M
authors.lastname: Kusama
authors.forename: S
authors.initials: S
authors.lastname: Enomoto
mesh_terms: D018249:Adenoma, Oxyphilic / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D000368:Aged; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010307:Parotid Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m
chemical_list: D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m