Bright rim sign (DNET)
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The bright rim sign, also known as the hyperintense ring sign, has been described in dysembryoplastic neuroepithelial tumours (DNET) and. It is seen, as the name so aptly describes,described as a well defined rim of high signal around the DNET on FLAIR sequences sequences. This T2/FLAIR hyperintense ring, whether complete or in complete, is fairly sensitive and specific for DNET2.
The pathologic correlate of On post-operative imaging, this sign ismay be a helpful clue for residual tumor or tumor recurrence2.
On pathologic examination, this bright rim sign corresponds to glioneural elements loosely packed at the margin of the tumourtumor 1.
-<p>The <strong>bright rim sign</strong>, also known as the <strong>hyperintense ring sign</strong>, has been described in <a href="/articles/dysembryoplastic-neuroepithelial-tumour">dysembryoplastic neuroepithelial tumours (DNET)</a> and is seen, as the name so aptly describes, as a rim of high signal around the DNET on <a href="/articles/fluid-attenuation-inversion-recovery">FLAIR</a> sequences.</p><p>The pathologic correlate of this sign is glioneural elements loosely packed at the margin of the tumour <sup>1</sup><sup> </sup>.</p>- +<p><!--[if gte mso 9]><xml>
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- +<![endif]--><!--StartFragment--></p><p>The <strong>bright rim sign</strong>, also known as the <strong>hyperintense ring sign</strong>, has been described in <a href="/articles/dysembryoplastic-neuroepithelial-tumour">dysembryoplastic neuroepithelial tumours (DNET)</a>. It is described as a well defined rim of high signal around the DNET on <a href="/articles/fluid-attenuation-inversion-recovery">FLAIR</a> sequences. This T2/FLAIR hyperintense ring, whether complete or in complete, is fairly sensitive and specific for DNET<sup>2</sup>. On post-operative imaging, this sign may be a helpful clue for residual tumor or tumor recurrence<sup>2</sup>. </p><p>On pathologic examination, this bright rim sign corresponds to glioneural elements loosely packed at the margin of the tumor <sup>1 </sup>.</p><p><!--EndFragment--></p>
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