Beware of the glycemia.

in both anterior choroidal artery territories that were compatible with acute ischemic stroke. On perfusion-weighted imaging, cerebral blood flow and volume were slightly increased ( fig. 1 a). There was no abnormality on the FLAIR images, nor was there any arterial occlusion visible on intracranial three-dimensional time-offlight MRI. However, glycemia was low at 2.06 mmol/l. The hypoglycemia was quickly corrected, and all neurological symptoms resolved within a few hours. In a second brain MRI scan performed 2 days later at 1.5-tesla, the whole lesion which had previously been visible had disappeared ( fig. 1 b).