• BMJ case reports · Jan 2014

    Case Reports

    Evaluation of mild encephalitis/encephalopathy with a reversible splenial lesion (MERS) by diffusion-weighted and diffusion tensor imaging.

    • Balasubramanyam Shankar, Ramakrishna Narayanan, Pushkaran Muralitharan, and Balamurugan Ulaganathan.
    • Department of Radiodiagnosis, Kasturba Medical College, Manipal University, Manipal, Karnataka, India.
    • BMJ Case Rep. 2014 Jan 1;2014.

    AbstractMild encephalitis/encephalopathy with a reversible splenial lesion (MERS) is a clinicoradiological entity with varied aetiologies and having a typical course of evolution. We present a case of MERS evaluated with diffusion-weighted and diffusion tensor imaging along with various conventional sequences of MRI. At the time of presentation, the lesions in the splenium of corpus callosum and bilateral cerebral white matter showed diffusion restriction with reduced apparent diffusion coefficient and no reduction in fractional anisotropy (FA) values on diffusion tensor imaging; on follow-up diffusion restriction completely resolved with normalisation of the apparent diffusion coefficient. The normal to slightly increased FA values in the lesions may indicate that MERS is a non-degenerative disorder.2014 BMJ Publishing Group Ltd.

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