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      <div class="highwire-cite-overline"><span  class="highwire-cite-metadata-article-type highwire-cite-metadata">Reply</span><span class="separator-pipe"></span><span  class="highwire-cite-metadata-art-cat highwire-cite-metadata"><span class="wrapper">LETTER</span></span></div>
  
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    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">Arian Lasocki</span>, <span class="highwire-citation-author" data-delta="1">Michael E. Buckland</span> and <span class="highwire-citation-author" data-delta="2">Frank Gaillard</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">July 2024,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">45 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(7) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">E23; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata">DOI: https://doi.org/10.3174/ajnr.A8347 </span></div>
  
  
  
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<div id="hw-article-author-popups-top-node-108549--61898171528" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">Arian Lasocki </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>Department of Cancer ImagingPeter MacCallum Cancer CentreMelbourne, Victoria, Australia</div><div class='author-affiliation'><span class='nlm-sup'>b</span>Sir Peter MacCallum Department of Oncology</div><div class='author-affiliation'><span class='nlm-sup'>c</span>Department of RadiologyThe University of MelbourneParkville, Victoria, Australia</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=Arian%2BLasocki%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Lasocki%20A&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AArian%2BLasocki%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-1"><div class="author-tooltip-name">Michael E. Buckland </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>d</span>Department of NeuropathologyRoyal Prince Alfred HospitalCamperdown, New South Wales, Australia</div><div class='author-affiliation'><span class='nlm-sup'>e</span>School of Medical SciencesUniversity of SydneyCamperdown, New South Wales, Australia</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=Michael%2BE.%2BBuckland%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Buckland%20ME&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AMichael%2BE.%2BBuckland%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-2"><div class="author-tooltip-name">Frank Gaillard </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>c</span>Department of RadiologyThe University of MelbourneParkville, Victoria, Australia</div><div class='author-affiliation'><span class='nlm-sup'>f</span>Department of RadiologyThe Royal Melbourne HospitalParkville, Victoria, Australia</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=Frank%2BGaillard%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Gaillard%20F&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AFrank%2BGaillard%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div></div></div>  </div>

  
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    <div class="highwire-markup"><div xmlns="http://www.w3.org/1999/xhtml" data-highwire-cite-ref-tooltip-instance="highwire_reflinks_tooltip" class="content-block-markup" xmlns:xhtml="http://www.w3.org/1999/xhtml"><div class="article fulltext-view "><span class="highwire-journal-article-marker-start"></span><p id="p-1">We would like to thank Patel et al for their insightful comments regarding our research<sup><a id="xref-ref-1-1" class="xref-bibr" href="#ref-1">1</a></sup> and how it fits in with their own earlier findings.<sup><a id="xref-ref-2-1" class="xref-bibr" href="#ref-2">2</a></sup> However, we do not think that the findings of the study that Patel et al have referenced<sup><a id="xref-ref-2-2" class="xref-bibr" href="#ref-2">2</a></sup> are at odds with our own, but rather are complementary. While there are similarities across the 2 publications, the research questions have subtle-but-important differences, and examined 2 different potential roles of radiogenomics.</p><p id="p-2">A fundamental difference between our studies is in how the key patient cohort was selected. Patel et al identified tumors with discordance between the imaging features and 1p/19q fluorescence in situ hybridization (FISH) results<sup><a id="xref-ref-2-3" class="xref-bibr" href="#ref-2">2</a></sup> on the basis of the premise that radiogenomics can be used to identify tumors in which molecular testing results should be questioned. We wholeheartedly agree with this concept and have previously highlighted this as one of several ways in which radiogenomics can add value for patients.<sup><a id="xref-ref-3-1" class="xref-bibr" href="#ref-3">3</a>,<a id="xref-ref-4-1" class="xref-bibr" href="#ref-4">4</a></sup> In addition to occasional inaccuracies of the testing methods themselves, histology is also dependent on the quality of the sample. Even sequencing can produce false-negative results if there are few tumor cells in the sample.<sup><a id="xref-ref-5-1" class="xref-bibr" href="#ref-5">5</a></sup></p><p id="p-3">In contrast, our study started with the molecular testing diagnosis. We targeted tumors with 1p- or 19q unideletion because we thought that these might have a higher likelihood of a false-negative 1p/19q result.<sup><a id="xref-ref-1-2" class="xref-bibr" href="#ref-1">1</a></sup> If we had found imaging appearances suggesting 1p/19q codeletion in a substantial portion of our cohort, it might have suggested value in repeating 1p/19q testing for all unideleted tumors. As it turns out, our results suggest that repeat 1p/19q testing is not warranted as a default, but we do not suggest that testing should not be repeated if there is discordance with imaging, because this issue was not assessed in this study. Additionally, we have not implied that the pathologist should consider only 1p/19q results when distinguishing astrocytomas and oligodendrogliomas.</p><p id="p-4">Ultimately, it is clear that both of our groups think that the addition of imaging features has the potential to positively influence patient management, compared with relying solely on histology. We agree that additional testing should be considered when histology and imaging findings are discordant. Furthermore, we suggest that correlating histology with imaging is relevant to not only 1p/19q FISH but also other molecular markers, other molecular testing methods, the determination of histologic grade,<sup><a id="xref-ref-6-1" class="xref-bibr" href="#ref-6">6</a></sup> and even the overarching histologic diagnosis of a glioma versus another disease entity. Indeed, such correlation is important across many areas of radiology.</p><div class="section ref-list" id="ref-list-1"><h2 class="">References</h2><ol class="cit-list ref-use-labels"><li><span class="ref-label">1.</span><a class="rev-xref-ref" href="#xref-ref-1-1" title="View reference 1. in text" id="ref-1">↵</a><div class="cit ref-cit ref-journal" id="cit-45.7.E23.1" data-doi="10.3174/ajnr.A8034"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Lasocki</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Buckland</span>  <span class="cit-name-given-names">ME</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Molinaro</span>  <span class="cit-name-given-names">T</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Radiogenomics provides insights into gliomas demonstrating single-arm 1p or 19q deletion</span>. <abbr class="cit-jnl-abbrev">AJNR Am J Neuroradiol</abbr> <span class="cit-pub-date">2023</span>;<span class="cit-vol">44</span>:<span class="cit-fpage">1270</span>–<span class="cit-lpage">74</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.3174/ajnr.A8034</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>37884300</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czoxMDoiNDQvMTEvMTI3MCI7czo0OiJhdG9tIjtzOjE5OiIvYWpuci80NS83L0UyMy5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span 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isocitrate dehydrogenase (IDH)-mutant lower-grade gliomas misclassified to 1p/19q codeletion status with fluorescence in situ hybridization</span>. <abbr class="cit-jnl-abbrev">Radiology</abbr> <span class="cit-pub-date">2020</span>;<span class="cit-vol">294</span>:<span class="cit-fpage">160</span>–<span class="cit-lpage">67</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1148/radiol.2019191140</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>31714193</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1148/radiol.2019191140&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=31714193&amp;link_type=MED&amp;atom=%2Fajnr%2F45%2F7%2FE23.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">3.</span><a class="rev-xref-ref" href="#xref-ref-3-1" title="View reference 3. in text" id="ref-3">↵</a><div class="cit ref-cit ref-journal" id="cit-45.7.E23.3" data-doi="10.3174/ajnr.A6769"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Lasocki</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Rosenthal</span>  <span class="cit-name-given-names">MA</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Roberts-Thomson</span>  <span class="cit-name-given-names">SJ</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Neuro-oncology and radiogenomics: time to integrate?</span> <abbr class="cit-jnl-abbrev">AJNR Am J Neuroradiol</abbr> <span class="cit-pub-date">2020</span>;<span class="cit-vol">41</span>:<span class="cit-fpage">1982</span>–<span class="cit-lpage">88</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.3174/ajnr.A6769</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>32912874</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czoxMDoiNDEvMTEvMTk4MiI7czo0OiJhdG9tIjtzOjE5OiIvYWpuci80NS83L0UyMy5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">4.</span><a class="rev-xref-ref" href="#xref-ref-4-1" title="View reference 4. in text" id="ref-4">↵</a><div class="cit ref-cit ref-journal" id="cit-45.7.E23.4" data-doi="10.21037/qims-22-1365"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Lasocki</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Roberts-Thomson</span>  <span class="cit-name-given-names">SJ</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Gaillard</span>  <span class="cit-name-given-names">F</span></span></li></ol><cite>. <span class="cit-article-title">Radiogenomics of adult intracranial gliomas after the 2021 World Health Organisation classification: a review of changes, challenges and opportunities</span>. <abbr class="cit-jnl-abbrev">Quant Imaging Med Surg</abbr> <span class="cit-pub-date">2023</span>;<span class="cit-vol">13</span>:<span class="cit-fpage">7572</span>–<span class="cit-lpage">81</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.21037/qims-22-1365</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>37969636</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.21037/qims-22-1365&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=37969636&amp;link_type=MED&amp;atom=%2Fajnr%2F45%2F7%2FE23.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">5.</span><a class="rev-xref-ref" href="#xref-ref-5-1" title="View reference 5. in text" id="ref-5">↵</a><div class="cit ref-cit ref-journal" id="cit-45.7.E23.5" data-doi="10.1007/s00401-013-1106-9"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Horbinski</span>  <span class="cit-name-given-names">C</span></span></li></ol><cite>. <span class="cit-article-title">What do we know about IDH1/2 mutations so far, and how do we use it?</span> <abbr class="cit-jnl-abbrev">Acta Neuropathol</abbr> <span class="cit-pub-date">2013</span>;<span class="cit-vol">125</span>:<span class="cit-fpage">621</span>–<span class="cit-lpage">36</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1007/s00401-013-1106-9</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>23512379</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1007/s00401-013-1106-9&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=23512379&amp;link_type=MED&amp;atom=%2Fajnr%2F45%2F7%2FE23.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">6.</span><a class="rev-xref-ref" href="#xref-ref-6-1" title="View reference 6. in text" id="ref-6">↵</a><div class="cit ref-cit ref-journal" id="cit-45.7.E23.6" data-doi="10.3174/ajnr.A4077"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Lasocki</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Tsui</span>  <span 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