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Bilateral near symmetrical confluent lesions in the peritrigonal region, temporo-parieto-occipital region, posterior aspects of internal and external capsules, selenium of corpus callosum, brain stem and cortico-spinal tracks.
After administration of the contrast, enhancement of the intermediate zone of bilateral peritrigonal and temporo-parieto-occipital region, splenium of corpus callosum and cortico-spinal tracks at brainstem, represents active demyelination and inflammation.