An encapsulated, intradural, extramedullary ependymoma of the midthoracic spinal cord appeared hyperintense relative to normal spinal cord on long repetition time (TR)/long echo time (TE) images and nearly isointense to cord on short TR/short TE images. Clinical history, myelography, magnetic resonance of the tumor in vivo and of the fresh intact specimen, and histopathology are presented.
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Wagle et al. (1988) studied this question.