Known case of Addison's disease, with headache and blurred vision.
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MRI reveals bilateral symmetrical changes in deep white matter of both tempero-parieto-occipital regions, periventricular regions posteriorly and splenium of corpus callosum. These appear hypointense on T1W and hyperintense on T2W and FLAIR sequences. No restricted diffusion.
The same signal changes are seen slightly involving the anterior midbrain.