• Neuroradiology · Jun 1997

    Case Reports

    Granulomatous amebic encephalitis caused by acanthamoeba.

    • J J Sell, F W Rupp, and W W Orrison.
    • Department of Radiology, University of New Mexico, Albuquerque 87131-5336, USA.
    • Neuroradiology. 1997 Jun 1; 39 (6): 434-6.

    AbstractInfections arising from free-living amebae are rare. They generally cause recognizable disease only in chronically ill, debilitated patients who are immune suppressed. Only about 70 cases of granulomatous amebic encephalitis have been reported. We present an unusual case of granulomatous encephalitis in a 35-year-old man. Neurologic examination and laboratory tests were inconclusive. CT demonstrated bilateral low-density areas with mild mass effect in the cortex and subcortical white matter, which showed increased signal on T2-weighted MRI. Craniotomy and brain biopsy revealed granulomatous encephalitis with acanthamoeba organisms. Though non-specific, imaging can support the diagnosis of amebic encephalitis and direct biopsy.

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