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<meta name="DC.Title" content="MR Imaging and Single-Photon Emission CT Findings after Gene Therapy for Human Glioblastoma" />
<meta name="DC.Date" content="2001-09-01" />
<meta name="DC.Publisher" content="American Journal of Neuroradiology" />
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<meta name="DC.Description" content="BACKGROUND AND PURPOSE: Our goal was to evaluate MR imaging findings after local intracerebral gene therapy in patients with glioblastoma and differentiate postoperative contrast enhancement phenomena.

METHODS: In all, 26 patients with supratentorial single lesion glioblastoma underwent tumor resection and intracerebral injection of murine retroviral vector–producer cells for gene therapy with the herpes simplex virus type I thymidine kinase gene/ganciclovir system. Serial contrast-enhanced MR studies were obtained before treatment and postoperatively on day 1 or 2; weeks 2, 4, 9, 13, 17, 25, and 33; and every 8 weeks thereafter. Iodomethyltyrosine single-photon emission CT (IMT-SPECT) investigations also were performed in selected cases.

RESULTS: Twelve patients showed nontumorous enhancement of various intensities after treatment, arising within 18 to 72 hours and persisting at 3 to 10 months. It was characterized by a strong local enhancement up to 20 mm thick, which was initially nodular and later linear along the resection cavity wall and surrounded by massive perifocal edema. This “flare” enhancement had features that clearly differed from those of residual tumor enhancements and benign postsurgical enhancements. The IMT-SPECT investigations showed increased amino acid uptake in patients with enhancement from residual or relapsing tumor, but not in patients with flare.

CONCLUSION: After local gene therapy, a unique dynamic, transient perifocal flare enhancement can occur on MR images. IMT-SPECT may help to differentiate between tumorous and nontumorous flare enhancements in patients with enhancing tissue on MR images after gene therapy for glioblastoma." />
<meta name="DC.Contributor" content="Frank W. Floeth" />
<meta name="DC.Contributor" content="Albrecht Aulich" />
<meta name="DC.Contributor" content="Karl J. Langen" />
<meta name="DC.Contributor" content="Klaus J. Burger" />
<meta name="DC.Contributor" content="Wolfgang J. Bock" />
<meta name="DC.Contributor" content="Friedrich Weber" />
<meta name="article:published_time" content="2001-09-01" />
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<meta name="citation_title" content="MR Imaging and Single-Photon Emission CT Findings after Gene Therapy for Human Glioblastoma" />
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<meta name="twitter:title" content="MR Imaging and Single-Photon Emission CT Findings after Gene Therapy for Human Glioblastoma" />
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<meta name="twitter:image" content="http://ajnr-stage2.stage.highwire.org/sites/default/files/highwire/ajnr/22/8.cover.gif" />
<meta name="twitter:description" content="BACKGROUND AND PURPOSE: Our goal was to evaluate MR imaging findings after local intracerebral gene therapy in patients with glioblastoma and differentiate postoperative contrast enhancement phenomena.

METHODS: In all, 26 patients with supratentorial single lesion glioblastoma underwent tumor resection and intracerebral injection of murine retroviral vector–producer cells for gene therapy with the herpes simplex virus type I thymidine kinase gene/ganciclovir system. Serial contrast-enhanced MR studies were obtained before treatment and postoperatively on day 1 or 2; weeks 2, 4, 9, 13, 17, 25, and 33; and every 8 weeks thereafter. Iodomethyltyrosine single-photon emission CT (IMT-SPECT) investigations also were performed in selected cases.

RESULTS: Twelve patients showed nontumorous enhancement of various intensities after treatment, arising within 18 to 72 hours and persisting at 3 to 10 months. It was characterized by a strong local enhancement up to 20 mm thick, which was initially nodular and later linear along the resection cavity wall and surrounded by massive perifocal edema. This “flare” enhancement had features that clearly differed from those of residual tumor enhancements and benign postsurgical enhancements. The IMT-SPECT investigations showed increased amino acid uptake in patients with enhancement from residual or relapsing tumor, but not in patients with flare.

CONCLUSION: After local gene therapy, a unique dynamic, transient perifocal flare enhancement can occur on MR images. IMT-SPECT may help to differentiate between tumorous and nontumorous flare enhancements in patients with enhancing tissue on MR images after gene therapy for glioblastoma." />
<meta name="og-title" property="og:title" content="MR Imaging and Single-Photon Emission CT Findings after Gene Therapy for Human Glioblastoma" />
<meta name="og-url" property="og:url" content="http://ajnr-stage2.stage.highwire.org/content/22/8/1517" />
<meta name="og-site-name" property="og:site_name" content="American Journal of Neuroradiology" />
<meta name="og-description" property="og:description" content="BACKGROUND AND PURPOSE: Our goal was to evaluate MR imaging findings after local intracerebral gene therapy in patients with glioblastoma and differentiate postoperative contrast enhancement phenomena.

METHODS: In all, 26 patients with supratentorial single lesion glioblastoma underwent tumor resection and intracerebral injection of murine retroviral vector–producer cells for gene therapy with the herpes simplex virus type I thymidine kinase gene/ganciclovir system. Serial contrast-enhanced MR studies were obtained before treatment and postoperatively on day 1 or 2; weeks 2, 4, 9, 13, 17, 25, and 33; and every 8 weeks thereafter. Iodomethyltyrosine single-photon emission CT (IMT-SPECT) investigations also were performed in selected cases.

RESULTS: Twelve patients showed nontumorous enhancement of various intensities after treatment, arising within 18 to 72 hours and persisting at 3 to 10 months. It was characterized by a strong local enhancement up to 20 mm thick, which was initially nodular and later linear along the resection cavity wall and surrounded by massive perifocal edema. This “flare” enhancement had features that clearly differed from those of residual tumor enhancements and benign postsurgical enhancements. The IMT-SPECT investigations showed increased amino acid uptake in patients with enhancement from residual or relapsing tumor, but not in patients with flare.

CONCLUSION: After local gene therapy, a unique dynamic, transient perifocal flare enhancement can occur on MR images. IMT-SPECT may help to differentiate between tumorous and nontumorous flare enhancements in patients with enhancing tissue on MR images after gene therapy for glioblastoma." />
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      <h1 class="highwire-cite-title" id="page-title">MR Imaging and Single-Photon Emission CT Findings after Gene Therapy for Human Glioblastoma</h1>  
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<div id="hw-article-author-popups-top-node-2766--81999014162" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">Frank W. 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    <div class="highwire-markup"><div xmlns="http://www.w3.org/1999/xhtml" class="content-block-markup" xmlns:xhtml="http://www.w3.org/1999/xhtml"><div xmlns:xhtml="http://www.w3.org/1999/xhtml" class="contributors"><ol class="contributor-list" id="contrib-group-1"><li class="contributor" id="contrib-1"><span class="name">Frank W. Floeth</span><a id="xref-aff-1-1" class="xref-aff" href="#aff-1">a</a>, </li><li class="contributor" id="contrib-2"><span class="name">Albrecht Aulich</span><a id="xref-aff-1-2" class="xref-aff" href="#aff-1">a</a>, </li><li class="contributor" id="contrib-3"><span class="name">Karl J. Langen</span><a id="xref-aff-1-3" class="xref-aff" href="#aff-1">a</a>, </li><li class="contributor" id="contrib-4"><span class="name">Klaus J. Burger</span><a id="xref-aff-1-4" class="xref-aff" href="#aff-1">a</a>, </li><li class="contributor" id="contrib-5"><span class="name">Wolfgang J. Bock</span><a id="xref-aff-1-5" class="xref-aff" href="#aff-1">a</a> and </li><li class="last" id="contrib-6"><span class="name">Friedrich Weber</span><a id="xref-aff-1-6" class="xref-aff" href="#aff-1">a</a></li></ol><ol class="affiliation-list"><li class="aff"><a id="aff-1" name="aff-1"></a><address><sup>a</sup>From the Departments of Neurosurgery (F.W.F., W.J.B., F.W.) and Diagnostic Radiology (A.A.), Heinrich-Heine-University, Düsseldorf; Institute of Medicine (K.J.L.), Research Center Jülich, Jülich; and Novartis Pharma GmbH (K.J.B.), Nürnberg, Germany.</address></li></ol></div></div><a href="http://ajnr-stage2.stage.highwire.org/content/22/8/1517.full" class="hw-link hw-link-article-full-text" data-icon-position="" data-hide-link-title="0">View Full Text</a></div>  </div>

  
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