title: Bilateral parotid oncocytoma with spontaneous intratumoral hemorrhage: a rare hypervascular parotid tumor with ASL perfusion.
abstract: We present a rare case of bilateral parotid oncocytoma with spontaneous intratumoral hemorrhage. Magnetic resonance imaging revealed multiple, bilateral, well-defined masses within the parotid glands with increased vascularity based on arterial spin labeling Magnetic Resonance (MR) perfusion imaging and restricted diffusion on diffusion-weighted imaging. During the clinical follow-up, the patient developed extensive hemorrhage from the largest tumor, presumably due to a combination of the hypervascular nature of oncocytoma and hemodialysis.
authors.affiliation: Department of Radiology, University of Utah Health Sciences Center, Salt Lake City, UT. Electronic address: Etsushi.Iida@hsc.utah.edu.
authors.forename: Etsushi
authors.initials: E
authors.lastname: Iida
authors.affiliation: Department of Radiology, University of Utah Health Sciences Center, Salt Lake City, UT. Electronic address: Richard.Wiggins@hsc.utah.edu.
authors.forename: Richard H
authors.initials: RH
authors.lastname: Wiggins
authors.affiliation: Department of Radiology, University of Utah Health Sciences Center, Salt Lake City, UT. Electronic address: Yoshimi.Anzai@hsc.utah.edu.
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Anzai
mesh_terms: D018249:Adenoma, Oxyphilic / Q000150:complications / Q000000981:diagnostic imaging*; D000369:Aged, 80 and over; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods; D005260:Female; D006470:Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology*; D006801:Humans; D010307:Parotid Neoplasms / Q000150:complications / Q000000981:diagnostic imaging*; D010477:Perfusion; D013113:Spin Labels; D014057:Tomography, X-Ray Computed
chemical_list: D013113:Spin Labels
keywords: Arterial spin labeling perfusion-weighted imaging; Intratumoral hemorrhage; MRI; Oncocytoma; Parotid gland