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    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">A. James Barkovich</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">January 2003,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">24 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(1) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">153; </span></div>
  
  
  
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<div id="hw-article-author-popups-top-node-10658--61558496137" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">A. James Barkovich </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=A.%2BJames%2BBarkovich%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=Barkovich%20AJ&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%3AA.%2BJames%2BBarkovich%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 thank Dr. Soto-Ares for his kind comments regarding our article (<a id="xref-ref-1-1" class="xref-bibr" href="#ref-1">1</a>) and extend our compliments on his very interesting article in the same issue of the <em>AJNR</em> (<a id="xref-ref-2-1" class="xref-bibr" href="#ref-2">2</a>). We agree with his comments that a classification based on embryology, genetics, or signaling molecules is optimal for the description of malformations; indeed, this subject was discussed in our article. However, as Dr. Soto-Ares acknowledges, such a classification is very difficult and we are a long way from having enough knowledge of cerebellar genetics and molecular biology to accomplish such a classification. For the present, we think that a radiologic classification is a useful first step in studying this complicated group of diseases, just as it has proved useful in studying cerebral cortical malformations (<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>) and anomalies of the cerebral commissures (<a id="xref-ref-5-1" class="xref-bibr" href="#ref-5">5</a>, <a id="xref-ref-6-1" class="xref-bibr" href="#ref-6">6</a>).</p><p id="p-2">Regarding Dr. Soto-Ares’ question about the pathogenesis of focal cerebellar cortical dysplasias in the absence of cerebral anomalies, we can suggest several possibilities, including focal ischemia or infection, somatic mosaicism, or different dosages of the same mutation in the same gene in different parts of the CNS. We agree that these are important questions that are not possible to answer by radiologic investigation.</p><p id="p-3">We are delighted to have interested and enlightened colleagues such as Dr. Soto-Ares working in this field of study. The contributions of Dr. Soto-Ares and his colleagues to the study of cerebellar malformations have been both interesting and enlightening (<a id="xref-ref-2-2" class="xref-bibr" href="#ref-2">2</a>, <a id="xref-ref-7-1" class="xref-bibr" href="#ref-7">7</a>). As advances in this field result from the cooperation of all those interested in the subject, we are happy that he has found our article worthy of comment and we hope for further interactions with his group and with others who have interest in cerebellar development and maldevelopment.</p><div class="section ref-list" id="ref-list-1"><h2>References</h2><ol class="cit-list"><li><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-other" id="cit-24.1.153-a.1"><div class="cit-metadata"><cite>Patel S, Barkovich AJ. <strong>Analysis and classification of cerebellar malformations.</strong> <span class="cit-source">AJNR Am J Neuroradiol</span> <span class="cit-pub-date">2002</span>;<span class="cit-vol">23</span>:<span class="cit-fpage">1074</span>–1087</cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czo5OiIyMy83LzEwNzQiO3M6NDoiYXRvbSI7czoyMToiL2FqbnIvMjQvMS8xNTMuMS5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" 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><a class="rev-xref-ref" href="#xref-ref-2-1" title="View reference 2 in text" id="ref-2">↵</a><div class="cit ref-cit ref-other" id="cit-24.1.153-a.2"><div class="cit-metadata"><cite>Soto-Ares G, Devisme L, Jorriot S, Deries B, Pruvo JP, Ruchoux MM. <strong>Neuropathologic and MR imaging correlation in a neonatal case of cerebellar cortical dysplasia.</strong> <span class="cit-source">AJNR Am J Neuroradiol</span> <span class="cit-pub-date">2002</span>;<span class="cit-vol">23</span>:<span class="cit-fpage">1101</span>–1104</cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czo5OiIyMy83LzExMDEiO3M6NDoiYXRvbSI7czoyMToiL2FqbnIvMjQvMS8xNTMuMS5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" 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><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-other" id="cit-24.1.153-a.3"><div class="cit-metadata"><cite>Barkovich AJ, Kuzniecky RI, Dobyns WB, Jackson GD, Becker LE, Evrard P. <strong>A classification scheme for malformations of cortical development.</strong> <span class="cit-source">Neuropediatrics</span> <span class="cit-pub-date">1996</span>;<span class="cit-vol">27</span>:<span class="cit-fpage">59</span>–63</cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=8737819&amp;link_type=MED&amp;atom=%2Fajnr%2F24%2F1%2F153.1.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><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-other" id="cit-24.1.153-a.4"><div class="cit-metadata"><cite>Barkovich AJ, Kuzniecky RI, Jackson GD, Guerrini R, Dobyns WB. <strong>Classification system for malformations of cortical development: update 2001.</strong> <span class="cit-source">Neurology</span> <span class="cit-pub-date">2001</span>;<span class="cit-vol">57</span>:<span class="cit-fpage">2168</span>–2178</cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6OToibmV1cm9sb2d5IjtzOjU6InJlc2lkIjtzOjEwOiI1Ny8xMi8yMTY4IjtzOjQ6ImF0b20iO3M6MjE6Ii9ham5yLzI0LzEvMTUzLjEuYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" 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><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-other" id="cit-24.1.153-a.5"><div class="cit-metadata"><cite>Raybaud CA, Girard N. <strong>Anatomic MRI study of commissural agenesis and dysplasia of the telencephalon (agenesis of the corpus callosum and related anomalies): clinical correlations and morphogenetic interpretation [in French].</strong> <span class="cit-source">Neurochirurgie</span> <span class="cit-pub-date">1998</span>;<span class="cit-vol">44[suppl 1]</span>:<span class="cit-fpage">38</span>–60</cite></div><div class="cit-extra"></div></div></li><li><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-other" id="cit-24.1.153-a.6"><div class="cit-metadata"><cite>Barkovich AJ, Simon EM, Walsh CA. <strong>Callosal agenesis with cyst: a better understanding and new classification.</strong> <span class="cit-source">Neurology</span> <span class="cit-pub-date">2001</span>;<span class="cit-vol">56</span>:<span class="cit-fpage">220</span>–227</cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6OToibmV1cm9sb2d5IjtzOjU6InJlc2lkIjtzOjg6IjU2LzIvMjIwIjtzOjQ6ImF0b20iO3M6MjE6Ii9ham5yLzI0LzEvMTUzLjEuYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" 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><a class="rev-xref-ref" href="#xref-ref-7-1" title="View reference 7 in text" id="ref-7">↵</a><div class="cit ref-cit ref-other" id="cit-24.1.153-a.7"><div class="cit-metadata"><cite>Soto-Ares G, Delmaire C, Deries B, Vallee L, Pruvo JP. <strong>Cerebellar cortical dysplasia: MR findings in a complex entity.</strong> <span class="cit-source">AJNR Am J Neuroradiol</span> <span class="cit-pub-date">2000</span>;<span class="cit-vol">21</span>:<span class="cit-fpage">1511</span>–1519</cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czo5OiIyMS84LzE1MTEiO3M6NDoiYXRvbSI7czoyMToiL2FqbnIvMjQvMS8xNTMuMS5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" 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></ol></div><ul class="copyright-statement"><li class="fn" id="copyright-statement-1">Copyright © American Society of Neuroradiology</li></ul><span class="highwire-journal-article-marker-end"></span></div><span class="related-urls"></span></div></div>  </div>

  
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        	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-volume highwire-cite-metadata">Vol. 24</span>, <span  class="highwire-cite-metadata-issue highwire-cite-metadata">Issue 1 </span><div  class="highwire-cite-metadata-pubdate highwire-cite-metadata">1 Jan 2003 </div></div>
      
      
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