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A 57 year old male with a Na+ level of 115mEq/L, corrected over 1-2days, with osmotic demyelination syndrome affecting the PVWM and basal ganglia. Mildly reduced diffusion is noted within the PVWM bilaterally (arrows) on DWI (A) and the ADC map (B), with basal ganglial hyperintensities also present on FLAIR (arrows, C), but sparing the pons on FLAIR (D). Hence, as the basal ganglia are additionally involved, this is not characteristic of ATL.
