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AJNR - American Journal of Neuroradiology

Published ahead of print on February 13, 2008
doi: 10.3174/ajnr.A0974

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

H. Kato^a, M. Kanematsu^a,b, K. Mizuta^c, Y. Ito^c and Y. Hirose^d

^a Department of Radiology, Gifu University School of Medicine, Gifu, Japan
^b High-level Imaging Diagnosis Center, Gifu University Hospital, Gifu, Japan
^c Department of Otolaryngology, Gifu University School of Medicine, Gifu, Japan
^d Department of Pathology, Gifu University School of Medicine, Gifu, Japan

View larger version (81K): [in this window] [in a new window]   Fig 1. A 48-year-old woman with a carcinoma ex pleomorphic adenoma (case 1). A, Axial T2-weighted image (fast spin-echo: TR/TE, 4102/90) shows a well-demarcated mass with heterogeneous intensity of the right parotid gland. The lateral component shows mild high intensity (arrow), the intermediate component shows low intensity (arrowhead), and the medial component shows extremely high intensity (curved arrow). B, ADC mapping image shows the lateral component of hypercellularity with carcinoma (arrow) and the intermediate and medial component of hypocellularity with pleomorphic adenoma (curved arrow).

View larger version (95K): [in this window] [in a new window]   Fig 2. A 76-year-old man with a carcinoma ex pleomorphic adenoma (case 2). A, Axial T2-weighted image (fast spin-echo: TR/TE, 4102/90) shows a mainly well-demarcated mass with heterogeneous intensity of the right parotid gland. The anterior component shows mild high intensity (arrowheads), and the margin of the posterior component shows low intensity (arrow). B, ADC mapping image shows the anterior component of hypercellularity with carcinoma (arrowheads) and the posterior component of hypocellularity with pleomorphic adenoma (arrow).