• Bmc Neurol · Jan 2014

    Anti-leucine rich glioma inactivated 1 protein and anti-N-methyl-D-aspartate receptor encephalitis show distinct patterns of brain glucose metabolism in 18F-fluoro-2-deoxy-d-glucose positron emission tomography.

    • Florian Wegner, Florian Wilke, Peter Raab, Said Ben Tayeb, Anna-Lena Boeck, Cathleen Haense, Corinna Trebst, Elke Voss, Christoph Schrader, Frank Logemann, Jörg Ahrens, Andreas Leffler, Rea Rodriguez-Raecke, Reinhard Dengler, Lilli Geworski, Frank M Bengel, Georg Berding, Martin Stangel, and Elham Nabavi.
    • Department of Neurology, Hannover Medical School, Carl-Neuberg-Str, 1, 30625 Hannover, Germany. wegner.florian@mh-hannover.de.
    • Bmc Neurol. 2014 Jan 1;14:136.

    BackgroundPathogenic autoantibodies targeting the recently identified leucine rich glioma inactivated 1 protein and the subunit 1 of the N-methyl-D-aspartate receptor induce autoimmune encephalitis. A comparison of brain metabolic patterns in 18F-fluoro-2-deoxy-d-glucose positron emission tomography of anti-leucine rich glioma inactivated 1 protein and anti-N-methyl-D-aspartate receptor encephalitis patients has not been performed yet and shall be helpful in differentiating these two most common forms of autoimmune encephalitis.MethodsThe brain 18F-fluoro-2-deoxy-d-glucose uptake from whole-body positron emission tomography of six anti-N-methyl-D-aspartate receptor encephalitis patients and four patients with anti-leucine rich glioma inactivated 1 protein encephalitis admitted to Hannover Medical School between 2008 and 2012 was retrospectively analyzed and compared to matched controls.ResultsGroup analysis of anti-N-methyl-D-aspartate encephalitis patients demonstrated regionally limited hypermetabolism in frontotemporal areas contrasting an extensive hypometabolism in parietal lobes, whereas the anti-leucine rich glioma inactivated 1 protein syndrome was characterized by hypermetabolism in cerebellar, basal ganglia, occipital and precentral areas and minor frontomesial hypometabolism.ConclusionsThis retrospective 18F-fluoro-2-deoxy-d-glucose positron emission tomography study provides novel evidence for distinct brain metabolic patterns in patients with anti-leucine rich glioma inactivated 1 protein and anti-N-methyl-D-aspartate receptor encephalitis.

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