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<meta name="DC.Title" content="Warthin Tumor of the Parotid Gland: Diagnostic Value of MR Imaging with Histopathologic Correlation" />
<meta name="DC.Date" content="2004-08-01" />
<meta name="DC.Publisher" content="American Journal of Neuroradiology" />
<meta name="DC.Rights" content="Copyright © American Society of Neuroradiology" />
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<meta name="DC.Description" content="BACKGROUND AND PURPOSE: The purpose of our study was to describe the MR imaging appearance of Warthin tumors multiple MR imaging techniques and to interpret the difference in appearance from that of malignant parotid tumors.

METHODS: T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic MR images of 19 Warthin tumors and 17 malignant parotid tumors were reviewed. MR imaging results were compared with those of pathologic analysis.

RESULTS: Epithelial stromata and lymphoid tissue with slitlike small cysts in Warthin tumors showed early enhancement and a high washout rate (≥30%) on dynamic contrast-enhanced images, and accumulations of complicated cysts showed early enhancement and a low washout ratio (&lt;30%). The areas containing complicated cysts showed high signal intensity on T1-weighted images, whereas some foci in those areas showed low signal intensity on short tau inversion recovery images. The mean minimum signal intensity ratios (SIRmin) of Warthin tumor on short tau inversion recovery (0.29 ± 0.22 SD) ( P &lt; .01) and T2-weighted images (0.28 ± 0.09) ( P &lt; .05) were significantly lower than those of malignant parotid tumors (0.53 ± 0.19, 0.48 ± 0.19). The average washout ratio of Warthin tumors (44.0 ± 20.4%) was higher than that of malignant parotid tumors (11.9 ± 11.6%). The mean apparent diffusion coefficient of Warthin tumors (0.96 ± 0.13 × 10−3mm2/s) was significantly lower ( P &lt; .01) than that of malignant tumors (1.19 ± 0.19 × 10−3mm2/s).

CONCLUSION: Detecting hypointense areas of short tau inversion recovery and T2-weighted images or low apparent diffusion coefficient values on diffusion-weighted images was useful for predicting whether salivary gland tumors were Warthin tumors. The findings of the dynamic contrast-enhanced study also were useful." />
<meta name="DC.Contributor" content="Mitsuaki Ikeda" />
<meta name="DC.Contributor" content="Ken Motoori" />
<meta name="DC.Contributor" content="Toyoyuki Hanazawa" />
<meta name="DC.Contributor" content="Yuichiro Nagai" />
<meta name="DC.Contributor" content="Seiji Yamamoto" />
<meta name="DC.Contributor" content="Takuya Ueda" />
<meta name="DC.Contributor" content="Hiroyuki Funatsu" />
<meta name="DC.Contributor" content="Hisao Ito" />
<meta name="article:published_time" content="2004-08-01" />
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<meta name="citation_title" content="Warthin Tumor of the Parotid Gland: Diagnostic Value of MR Imaging with Histopathologic Correlation" />
<meta name="citation_abstract" lang="en" content="&lt;p&gt;&lt;i&gt;BACKGROUND AND PURPOSE:&lt;/i&gt; The purpose of our study was to describe the MR imaging appearance of Warthin tumors multiple MR imaging techniques and to interpret the difference in appearance from that of malignant parotid tumors.&lt;/p&gt;&lt;p&gt;&lt;i&gt;METHODS:&lt;/i&gt; T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic MR images of 19 Warthin tumors and 17 malignant parotid tumors were reviewed. MR imaging results were compared with those of pathologic analysis.&lt;/p&gt;&lt;p&gt;&lt;i&gt;RESULTS:&lt;/i&gt; Epithelial stromata and lymphoid tissue with slitlike small cysts in Warthin tumors showed early enhancement and a high washout rate (≥30%) on dynamic contrast-enhanced images, and accumulations of complicated cysts showed early enhancement and a low washout ratio (&amp;lt;30%). The areas containing complicated cysts showed high signal intensity on T1-weighted images, whereas some foci in those areas showed low signal intensity on short tau inversion recovery images. The mean minimum signal intensity ratios (SIR&lt;sub&gt;min&lt;/sub&gt;) of Warthin tumor on short tau inversion recovery (0.29 ± 0.22 SD) (&lt;i&gt;P&lt;/i&gt; &amp;lt; .01) and T2-weighted images (0.28 ± 0.09) (&lt;i&gt;P&lt;/i&gt; &amp;lt; .05) were significantly lower than those of malignant parotid tumors (0.53 ± 0.19, 0.48 ± 0.19). The average washout ratio of Warthin tumors (44.0 ± 20.4%) was higher than that of malignant parotid tumors (11.9 ± 11.6%). The mean apparent diffusion coefficient of Warthin tumors (0.96 ± 0.13 × 10&lt;sup&gt;−3&lt;/sup&gt;mm&lt;sup&gt;2&lt;/sup&gt;/s) was significantly lower (&lt;i&gt;P&lt;/i&gt; &amp;lt; .01) than that of malignant tumors (1.19 ± 0.19 × 10&lt;sup&gt;−3&lt;/sup&gt;mm&lt;sup&gt;2&lt;/sup&gt;/s).&lt;/p&gt;&lt;p&gt;&lt;i&gt;CONCLUSION:&lt;/i&gt; Detecting hypointense areas of short tau inversion recovery and T2-weighted images or low apparent diffusion coefficient values on diffusion-weighted images was useful for predicting whether salivary gland tumors were Warthin tumors. The findings of the dynamic contrast-enhanced study also were useful.&lt;/p&gt;" />
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<meta name="twitter:title" content="Warthin Tumor of the Parotid Gland: Diagnostic Value of MR Imaging with Histopathologic Correlation" />
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<meta name="twitter:description" content="BACKGROUND AND PURPOSE: The purpose of our study was to describe the MR imaging appearance of Warthin tumors multiple MR imaging techniques and to interpret the difference in appearance from that of malignant parotid tumors.

METHODS: T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic MR images of 19 Warthin tumors and 17 malignant parotid tumors were reviewed. MR imaging results were compared with those of pathologic analysis.

RESULTS: Epithelial stromata and lymphoid tissue with slitlike small cysts in Warthin tumors showed early enhancement and a high washout rate (≥30%) on dynamic contrast-enhanced images, and accumulations of complicated cysts showed early enhancement and a low washout ratio (&lt;30%). The areas containing complicated cysts showed high signal intensity on T1-weighted images, whereas some foci in those areas showed low signal intensity on short tau inversion recovery images. The mean minimum signal intensity ratios (SIRmin) of Warthin tumor on short tau inversion recovery (0.29 ± 0.22 SD) ( P &lt; .01) and T2-weighted images (0.28 ± 0.09) ( P &lt; .05) were significantly lower than those of malignant parotid tumors (0.53 ± 0.19, 0.48 ± 0.19). The average washout ratio of Warthin tumors (44.0 ± 20.4%) was higher than that of malignant parotid tumors (11.9 ± 11.6%). The mean apparent diffusion coefficient of Warthin tumors (0.96 ± 0.13 × 10−3mm2/s) was significantly lower ( P &lt; .01) than that of malignant tumors (1.19 ± 0.19 × 10−3mm2/s).

CONCLUSION: Detecting hypointense areas of short tau inversion recovery and T2-weighted images or low apparent diffusion coefficient values on diffusion-weighted images was useful for predicting whether salivary gland tumors were Warthin tumors. The findings of the dynamic contrast-enhanced study also were useful." />
<meta name="og-title" property="og:title" content="Warthin Tumor of the Parotid Gland: Diagnostic Value of MR Imaging with Histopathologic Correlation" />
<meta name="og-url" property="og:url" content="http://ajnr-stage2.stage.highwire.org/content/25/7/1256" />
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<meta name="og-description" property="og:description" content="BACKGROUND AND PURPOSE: The purpose of our study was to describe the MR imaging appearance of Warthin tumors multiple MR imaging techniques and to interpret the difference in appearance from that of malignant parotid tumors.

METHODS: T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic MR images of 19 Warthin tumors and 17 malignant parotid tumors were reviewed. MR imaging results were compared with those of pathologic analysis.

RESULTS: Epithelial stromata and lymphoid tissue with slitlike small cysts in Warthin tumors showed early enhancement and a high washout rate (≥30%) on dynamic contrast-enhanced images, and accumulations of complicated cysts showed early enhancement and a low washout ratio (&lt;30%). The areas containing complicated cysts showed high signal intensity on T1-weighted images, whereas some foci in those areas showed low signal intensity on short tau inversion recovery images. The mean minimum signal intensity ratios (SIRmin) of Warthin tumor on short tau inversion recovery (0.29 ± 0.22 SD) ( P &lt; .01) and T2-weighted images (0.28 ± 0.09) ( P &lt; .05) were significantly lower than those of malignant parotid tumors (0.53 ± 0.19, 0.48 ± 0.19). The average washout ratio of Warthin tumors (44.0 ± 20.4%) was higher than that of malignant parotid tumors (11.9 ± 11.6%). The mean apparent diffusion coefficient of Warthin tumors (0.96 ± 0.13 × 10−3mm2/s) was significantly lower ( P &lt; .01) than that of malignant tumors (1.19 ± 0.19 × 10−3mm2/s).

CONCLUSION: Detecting hypointense areas of short tau inversion recovery and T2-weighted images or low apparent diffusion coefficient values on diffusion-weighted images was useful for predicting whether salivary gland tumors were Warthin tumors. The findings of the dynamic contrast-enhanced study also were useful." />
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        	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-volume highwire-cite-metadata">Vol. 25</span>, <span  class="highwire-cite-metadata-issue highwire-cite-metadata">Issue 7 </span><div  class="highwire-cite-metadata-pubdate highwire-cite-metadata">1 Aug 2004 </div></div>
      
      
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      <div class="highwire-cite-title">Warthin Tumor of the Parotid Gland: Diagnostic Value of MR Imaging with Histopathologic Correlation</div>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0"><span class="nlm-given-names">Mitsuaki</span> <span class="nlm-surname">Ikeda</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">Ken</span> <span class="nlm-surname">Motoori</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">Toyoyuki</span> <span class="nlm-surname">Hanazawa</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">Yuichiro</span> <span class="nlm-surname">Nagai</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">Seiji</span> <span class="nlm-surname">Yamamoto</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">Takuya</span> <span class="nlm-surname">Ueda</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">Hiroyuki</span> <span class="nlm-surname">Funatsu</span></span>, <span class="highwire-citation-author" data-delta="7"><span class="nlm-given-names">Hisao</span> <span class="nlm-surname">Ito</span></span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">Aug 2004, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">25 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(7) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1256-1262; </span></div>
  
  
  
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      <div class="highwire-cite-title">Warthin Tumor of the Parotid Gland: Diagnostic Value of MR Imaging with Histopathologic Correlation</div>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0"><span class="nlm-given-names">Mitsuaki</span> <span class="nlm-surname">Ikeda</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">Ken</span> <span class="nlm-surname">Motoori</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">Toyoyuki</span> <span class="nlm-surname">Hanazawa</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">Yuichiro</span> <span class="nlm-surname">Nagai</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">Seiji</span> <span class="nlm-surname">Yamamoto</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">Takuya</span> <span class="nlm-surname">Ueda</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">Hiroyuki</span> <span class="nlm-surname">Funatsu</span></span>, <span class="highwire-citation-author" data-delta="7"><span class="nlm-given-names">Hisao</span> <span class="nlm-surname">Ito</span></span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">Aug 2004, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">25 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(7) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1256-1262; </span></div>
  
  
  
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