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    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">Patricia A. Hudgins</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 2000,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">21 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(1) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">233; </span></div>
  
  
  
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<div id="hw-article-author-popups-top-node-2128--61546508512" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">Patricia A. Hudgins </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>c</span>Director, NeuroradiologyEmory University Hospital</div>M.D</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=Patricia%2BA.%2BHudgins%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=Hudgins%20PA&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%3APatricia%2BA.%2BHudgins%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><div class="section" id="sec-1"><p id="p-1">We would like to thank Ide and colleagues for their letter drawing our attention to their case report, <em>An Early Observation of Carotid Involvement by Retropharyngeal Abscess.</em> Their article was published after our paper had been accepted, but before it was revised, which likely explains the oversight on our part. We would like to comment on several of the points addressed by the authors.</p><p id="p-2">To summarize, Ide et al appear concerned that we have underestimated the seriousness of internal carotid artery (ICA) narrowing in children with retropharyngeal abscess (RTPA), and that this may portend ICA occlusion of pseudoaneurysm that is clinically occult.</p><p id="p-3">Although we did not appreciate the abnormal enhancement in the ICA wall to the level of the cavernous segment on CT that was enhanced on MR scans, we think it is unlikely that we have underestimated the degree of carotid involvement. Indeed, we pointed out that the degree of ICA narrowing was quite severe in several of our patients. It does appear, however, that if the perivascular inflammatory process (RTPA) is treated expeditiously with surgery, the vascular findings in our investigation, based on clinical follow-up, appeared to have no sequelae in the 13 patients we studied <a id="xref-ref-1-1" class="xref-bibr" href="#ref-1">(1)</a>.</p><p id="p-4">Ide et al suggest that clinical follow-up is not reliable to exclude ICA disease, because “children almost always tolerate [ICA] occlusion well clinically.” Based on clinical experience in large trauma and sickle cell populations treated at our pediatric hospital, complete ICA occlusion in childhood is commonly a devastating event resulting in dramatic neurologic impairment. We think it is unlikely that a complete ICA occlusion would be asymptomatic, especially in 13 sequential children.</p><p id="p-5">We maintain that the only imaging required acutely is contrast-enhanced CT. Children with RTPA are seriously ill. Spiral CT is fast, requires no sedation in a child who already may have airway compromise, and, even if distal ICA enhancement is not appreciated on CT as it is on contrast-enhanced MR imaging, the treatment is still surgery or close observation and IV antibiotics. What additional information is gained with contrast-enhanced MR imaging? Of what significance is visualization of perivascular enhancement remote from the infection? Even in the authors' limited experience, the findings resolve after surgery. Furthermore, MR imaging might delay definitive treatment.</p><p id="p-6">Should postoperative MR imaging be performed to rule out ICA occlusion or pseudoaneurysm? The authors are correct in stating that ICA occlusion/pseudoaneurysm are potential complications of cervical adenitis in children <a id="xref-ref-2-1" class="xref-bibr" href="#ref-2">(2–4)</a>. The frequency of this complication, however, cannot be determined, as cases are sporadic and reported as single episodes. If the authors are aware of any literature suggesting that ICA occlusion/pseudoaneurysm is a frequent complication of RTPA, we would appreciate seeing the data. Although ICA injury is definitely a complication of penetrating neck trauma, we are unaware of any large series reporting vascular injury common (or even uncommon) after RTPA. Therefore, ICA injury following surgically treated RTPA appears to be rare, and to recommend postsurgical MR imaging because of a speculation of potential ICA injury is not based on enough evidence to change our practice. In our broad clinical experience dealing with RTPA, none of our surgeons or pediatric neuroradiologists have seen any child return with symptoms referable to ICA injury or occlusion.</p><p id="p-7">In summary, ICA narrowing ipsilateral to RTPA is a dramatic imaging finding that, together with the clinical status of the patient, implies a serious inflammatory process that should be treated expeditiously. In light of the absence of compelling data that suggests otherwise, and based on our clinical experience, we maintain that neurologic sequelae are rare and follow-up imaging is not routinely recommended.</p></div><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">4.</span><a class="rev-xref-ref" href="#xref-ref-1-1" title="View reference 4 in text" id="ref-1">↵</a><div class="cit ref-cit ref-other" id="cit-21.1.233.1"><div class="cit-metadata"><cite>Hudgins PA, Dorey JH, Jacobs IN.  <strong>Internal carotid artery narrowing in children with retropharyngeal lymphadenitis and abscess.</strong> <span class="cit-source">AJNR Am J Neuroradiol</span> <span class="cit-pub-date">1998</span>;<span class="cit-vol">19</span>:<span class="cit-fpage">1841</span>-1843</cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czoxMDoiMTkvMTAvMTg0MSI7czo0OiJhdG9tIjtzOjIxOiIvYWpuci8yMS8xLzIzMy4xLmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span></span></a></div></div></li><li><span class="ref-label">5.</span><a class="rev-xref-ref" href="#xref-ref-2-1" title="View reference 5 in text" id="ref-2">↵</a><div class="cit ref-cit ref-other" id="cit-21.1.233.2"><div class="cit-metadata"><cite>Tagawa T, Mimaki T, Yabuuchi H, Iwata Y, Makino A.  <strong>Bilateral occlusions in the cervical portion of the internal carotid arteries in a child.</strong> <span class="cit-source">Stroke</span> <span class="cit-pub-date">1985</span>;<span class="cit-vol">16 (5)</span>:<span class="cit-fpage">896</span>-898</cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6OToic3Ryb2tlYWhhIjtzOjU6InJlc2lkIjtzOjg6IjE2LzUvODk2IjtzOjQ6ImF0b20iO3M6MjE6Ii9ham5yLzIxLzEvMjMzLjEuYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span></span></a></div></div></li><li><span class="ref-label">6.</span><div class="cit ref-cit ref-other no-rev-xref" id="cit-21.1.233.3"><div class="cit-metadata"><cite>Kata T, Oto K, Iwasaki A,  etal  <strong>Microbial extracranial aneurysm of the internal carotid artery: complication of cervical lymphadenitis.</strong> <span class="cit-source">Ann Otol Rhinol Laryngol</span> <span class="cit-pub-date">1999</span>;<span class="cit-vol">108</span>:<span class="cit-fpage">314</span>-317</cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10086628&amp;link_type=MED&amp;atom=%2Fajnr%2F21%2F1%2F233.1.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">7.</span><div class="cit ref-cit ref-other no-rev-xref" id="cit-21.1.233.4"><div class="cit-metadata"><cite>Krysl J, Noel de, Till L, Armstrong D.  <strong>Pseudoaneurysm of the internal carotid artery: Complication of deep neck space infection.</strong> <span class="cit-source">AJNR Am J Neuroradiol</span> <span class="cit-pub-date">1993</span>;<span class="cit-vol">14</span>:<span class="cit-fpage">696</span>-698</cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czo4OiIxNC8zLzY5NiI7czo0OiJhdG9tIjtzOjIxOiIvYWpuci8yMS8xLzIzMy4xLmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==" 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. 21</span>, <span  class="highwire-cite-metadata-issue highwire-cite-metadata">Issue 1 </span><div  class="highwire-cite-metadata-pubdate highwire-cite-metadata">1 Jan 2000 </div></div>
      
      
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