Figure 1.

Axial CT images of the brain without intravenous contrast showing symmetrical abnormal hypodensity in the bilateral globus pallidus (small arrows) and posterior cerebellar hemispheres (hash tags) corresponding to regions of reduced diffusivity and FLAIR hyperintensity on subsequent brain MRI. Apparent hypodensity in the pons (large arrow) was suspicious for an additional site of involvement but had no correlate on subsequent MRI and proved to be an artefact. Conversely, abnormality of the bilateral centrum semiovale (asterisks) was not appreciated on the CT scan and was only evident on subsequent MRI.