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Identification of Warthin Tumor: Magnetic Resonance Imaging Versus Salivary Scintigraphy With Technetium-99m Pertechnetate

Motoori, Ken MD*; Ueda, Takuya MD*; Uchida, Yoshitaka MD*; Chazono, Hideaki MD; Suzuki, Homare MD; Ito, Hisao MD*

Journal of Computer Assisted Tomography: July-August 2005 - Volume 29 - Issue 4 - p 506-512
doi: 10.1097/01.rct.0000164672.34261.33
Neuroimaging: Original Article
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Objective: The aim of this study was to evaluate the accuracy of technetium-99m (Tc-99m) pertechnetate scintigraphy and magnetic resonance (MR) imaging in the diagnosis of Warthin tumor.

Methods: Sixteen cases of Warthin tumor and 17 cases of non-Warthin tumor were examined by Tc-99m pertechnetate scintigraphy with lemon juice stimulation and MR imaging, including T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic images. We used the receiver operating characteristic (ROC) curve to evaluate diagnostic accuracy.

Results: The mean area under the ROC curves of MR imaging in the diagnosis of Warthin tumor (0.97) was higher than that of Tc-99m pertechnetate scintigraphy (0.88).

Conclusion: Magnetic resonance imaging is more useful in the evaluation of Warthin tumor than Tc-99m pertechnetate scintigraphy.

From the *Department of Radiology, Chiba University Hospital, Chiba City, Chiba, Japan, and †Department of Otolaryngology, Chiba University Hospital, Chiba City, Chiba, Japan.

Received for publication November 30, 2004; accepted March 24, 2005.

Reprints: Ken Motoori, Department of Radiology, Chiba University Hospital, 1-8-1, Inohana, Chuo-ku, Chiba City, Chiba, Japan (e-mail: motoorik@faculty.chiba-u.jp).

© 2005 Lippincott Williams & Wilkins, Inc.