AJDRAJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 2008;29:865.

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American Journal of Neuroradiology
DOI 10.3174/ajnr.A0974

HEAD & NECK

Carcinoma Ex Pleomorphic Adenoma of the Parotid Gland: Radiologic-Pathologic Correlation with MR Imaging Including Diffusion-Weighted Imaging

H. Kato, M. Kanematsu, K. Mizuta, Y. Ito and Y. Hirose

From the Department of Radiology (H.K., M.K.), Gifu University School of Medicine, Gifu, Japan; High-level Imaging Diagnosis Center (M.K.), Gifu University Hospital, Gifu, Japan; and Departments of Otolaryngology (K.M., Y.I.) and Pathology (Y.H.), Gifu University School of Medicine, Gifu, Japan.

Please address correspondence to Hiroki Kato, MD, Department of Radiology, Gifu University School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan; e-mail: hkato{at}gifu-u.ac.jp

SUMMARY: We present 4 cases of carcinoma ex pleomorphic adenoma of the parotid gland. In 3 of the 4 cases, diffusion-weighted and apparent diffusion coefficient (ADC) mapping images clearly revealed carcinoma as a hypercellular area with low ADC values and pleomorphic adenoma as a hypocellular area with high ADC values. Diffusion-weighted images demonstrated well complex tissue components in carcinoma ex pleomorphic adenoma, which may be useful for the diagnosis of this disease.




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