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Fig. 2 | BMC Neurology

Fig. 2

From: Delayed extensive brain edema caused by the growth of a giant basilar apex aneurysm treated with basilar artery obliteration: a case report

Fig. 2

Postoperative magnetic resonance imaging (MRI) did not detect ischemic complications. a-c: Sagittal nonenhanced T1-weighted images (T1WI) exhibited a newer clot, expressed as a sickle-shaped high signal intensity area (red arrows), on the outer surface of the intraluminal old thrombus. d-i: Fluid-attenuated inversion recovery (FLAIR) MRI depicted a thrombosed giant aneurysm severely compressing the brainstem in the backward direction. In addition, we observed marked edema surrounding the basilar apex (BA) aneurysm and involving the midbrain, thalamus and left internal capsule. The sickle-shaped high signal intensity structure was also observed on FLAIR images (red arrow in F). j-o: Diffusion weighted imaging (DWI) showed no high-intensity lesions, thus excluding ischemic complications. p-r: Sagittal (sag), coronal (cor) and axial (ax) maximum intensity projection (MIP) reconstructions of magnetic resonance angiography (MRA) showed a > 50% decrease of the aneurysm blood lumen

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