PMC6250033_01
Dynamic changes on brain MRI and CT imaging. ((a) and (b)) On admission, DWI or T2 sequences of MRI showed hyperintense signal intensity in the right centrum semiovale and hyperintense lacunar lesions adjacent to the left lateral ventricle. ((c) and (d)) On day 7 of admission, MRI showed hyperintense signal intensity in the left cerebellar hemisphere, left temporal lobe, and bilateral frontal-parietal lobe. A flow void was found in the left hemisphere (arrow). (e) MRA did not show any abnormality in the intracranial arteries. ((f) and (g)) On day 11 of admission, CT scan revealed high density nodules in the right frontal-parietal region and a low density shadow in the right parietal lobe. ((h)-(j)) On day 20 of admission, Contrast-enhanced CT showed high density nodules surrounded by edema in the left frontal-parietal region and a ring-enhancing nodule in the right parietal lobe with peripheral edema (arrow). ((k)-(n)); CT angiography showed an aneurysm on a cortical branch of the left middle cerebral artery.
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fig1
Magnetic resonance imaging (MRI) of the head showed hyperintense signal intensity on diffusion weighted imaging or T2-imaging in the right centrum semiovale, and lacunar lesions in the left hemisphere (Figures 1(a) and 1(b)). MRI of the head showed acute and subacute strokes in the brain (Figures 1(c) and 1(d)) and a flow void in the left hemisphere (Figure 1(d)). Magnetic Resonance Angiography (MRA) did not show any abnormalities in the intracranial arteries (Figure 1(e)). With additional symptoms of aphasia and left limb weakness, a CT scan revealed high density nodules with surrounding edema in the right frontal-parietal region and a low density shadow in the right parietal lobe (Figures 1(f) and 1(g)). CT revealed high density nodules in the left frontal-parietal region and a ring-enhancing nodule in the right parietal lobe (Figures 1(h)-1(j)), suggesting the presence of a brain abscess. CT angiography showed an aneurysm, measuring 8 by 9mm of a cortical branch of the left middle cerebral artery (Figures 1(k)-1(n)).