Journal
CLINICAL IMAGING
Volume 37, Issue 2, Pages 232-238Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.clinimag.2012.04.025
Keywords
Parotid neoplasms; Pleomorphic adenoma; Diffusion-weighted magnetic resonance imaging; Sensitivity; Specificity
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We evaluated the quantitative diffusion-weighted magnetic resonance imaging (DW-MRI) for parotid masses. Seventy-five patients with 81 focal parotid masses were included. Following DW-MRI, 73 masses underwent surgical biopsy/resection, 6 underwent ultrasonography-guided fine-needle aspiration, and 2 underwent both procedures. The mean apparent diffusion coefficient (ADC) of benign tumors (n=49, 1.72x10(-3) mm(2)/s) was higher than that of malignant tumors (n=32, 1.05x10(-3) mm(2)/s) (P<.001). ADC was 2.15x10(-3) mm(2)/s for pleomorphic adenomas, which was higher than that for other tumors (P<.001 for all). ADC cutoff was 1.315 for distinguishing between pleomorphic adenomas and others including malignant tumors. Therefore, DW-MRI may be useful for distinguishing between pleomorphic adenomas and other parotid masses. (C)2013 Elsevier Inc. All rights reserved.
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