RT Journal Article
SR Electronic
T1 Oncocytoma: The Vanishing Parotid Mass
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1703
OP 1706
DO 10.3174/ajnr.A2569
VO 32
IS 9
A1 Patel, N.D.
A1 van Zante, A.
A1 Eisele, D.W.
A1 Harnsberger, H.R.
A1 Glastonbury, C.M.
YR 2011
UL http://www.ajnr.org/content/32/9/1703.abstract
AB SUMMARY: Parotid gland oncocytoma is an uncommon, benign salivary neoplasm composed of mitochondria-rich oncocytes. The purpose of this study was to correlate MR imaging and histopathology of parotid gland oncocytomas and to define the features that may distinguish these neoplasms from other benign and malignant parotid gland tumors. The MR imaging features in 9 patients with a pathologic diagnosis of oncocytoma were retrospectively reviewed. The imaging features were strikingly similar for 8 of the 9 patients. All lesions appeared T1 hypointense but isointense to the native parotid gland on fat-saturated T2 and postcontrast T1 imaging. On MR imaging, parotid gland oncocytomas share specific imaging characteristics that have not been described for benign or malignant parotid gland tumors. Oncocytomas are isointense to native parotid gland on fat-saturated T2 and T1 postcontrast MR images. Preoperative identification of correct histology may help surgical planning. FDGfluorodeoxyglucoseFNABfine needle aspiration biopsyT1+Cpostcontrast T1T1 FS C+ WIpostcontrast T1-weighted imaging with fat saturationT1WIT1-weighted imagingT2 FS WIT2-weighted imaging with fat saturationT2WIT2-weighted imaging