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New high signal in the splenium of the corpus callosum, in the ventral mesencephalon and tectum, bilaterally in the nucleus dentatus and in the medulla oblongata. Note the high signal on DWI with high signal on the corresponding ADC map. This pattern is consistent with metronidazole-induced toxicity.
Frontally there is residual enhancement and gliosis from the massive abscess, where a bone-flap has been removed for surgical access.