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Magnetic resonance imaging of myoepithelioma in the salivary glands

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Abstract

Myoepithelioma is a rare benign tumor composed of cells showing myoepithelial differentiation and accounts for only 1.5 % of all tumors in the major and minor salivary glands. Herein, we report the magnetic resonance imaging (MRI) findings, including dynamic contrast-enhanced MRI (DCE-MRI) and diffusion-weighted MRI (DW-MRI), of two cases of myoepithelioma occurring in the salivary glands of the floor of the mouth and the hard palate. Both tumors were seen as well-defined ovoid masses with low or intermediate signal intensity on T1-weighted images, and inhomogeneous high signal intensity areas on T2-weighted images, whereas inhomogeneous enhancement was seen on post-contrast T1-weighted images. On DCE-MRI, both tumors showed a time–intensity curve of early enhancement and a low washout pattern (plateau enhancement pattern). Their apparent diffusion coefficients measured on DW-MRI were both relatively low (1.12 × 10−3 and 0.76 × 10−3 mm2/s). The findings for these two myoepitheliomas on DCE-MRI and DW-MRI were dissimilar to those in previous reports.

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The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Oral and Maxillofacial Radiology, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima Bunkyo-ku, Tokyo, 113-8549, Japan

    Ami Kuribayashi, Akemi Tetsumura, Norio Yoshino & Tohru Kurabayashi

  2. Department of Oral and Maxillofacial Radiology, Tokyo Dental College, 1-2-2 Masago, Mihama-ku, Chiba, 261-8502, Japan

    Akiko Imaizumi

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  1. Ami Kuribayashi
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  2. Akiko Imaizumi
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Correspondence to Ami Kuribayashi.

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Kuribayashi, A., Imaizumi, A., Tetsumura, A. et al. Magnetic resonance imaging of myoepithelioma in the salivary glands. Oral Radiol 29, 87–91 (2013). https://doi.org/10.1007/s11282-012-0109-x

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  • DOI: https://doi.org/10.1007/s11282-012-0109-x

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