PMC8247688_01
(a and b): a postoperative CT scan shows an abnormal subarachnoid contrast enhancement zone and a focal left parasagittal frontal hyperdense area. (c) A CT scan performed at 20 h shows a resorption of the subarachnoid hyperdensity and a new left parasagittal frontal hypodense area. (d) An MRI performed at 6 days reveals a hyperintense signal on FLAIR sequences in the left cortical precentral gyrus (as in case of vasogenic edema), excluding any signs of new ischemia.
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F1
A postoperative CT scan showed an edematous area in the left cerebral hemisphere, an abnormal subarachnoid contrast enhancement zone (probably secondary to contrast extravasation) and a focal left parasagittal frontal hyperdense area [Figure 1]. It also showed a resorption of the subarachnoid hyperdensity, supporting the hypothesis of contrast medium extravasation due to disruption of the blood-brain barrier (BBB) [Figure 1]. ADC maps, thus excluding any signs of new ischemia [Figure 1]. An MRI performed 6 months later showed the same radiological alterations [Figure 2].
An MRI performed at 6 months shows the same hyperintense signal on FLAIR.
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F2
ADC maps, thus excluding any signs of new ischemia [Figure 1]. An MRI performed 6 months later showed the same radiological alterations [Figure 2].