PMC6169348_01
(a) Computed tomography demonstrating hemorrhage in the right caudate nucleus with ventricular rupture. (b) Three-dimensional computed tomographic angiography demonstrating an aneurysm only on basilar artery (arrow). (c) A raw image of three-dimensional computed tomographic angiography on admission showing no abnormal enhancement adjacent to the hematoma. A small low-density area is observed in the hematoma (arrow)
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F1
Computed tomography (CT) revealed hemorrhage in the right caudate nucleus and ventricles, and hydrocephalus [Figure 1a]. 3D-CTA on admission demonstrated an aneurysm on the basilar artery (BA) at the bifurcation of the left superior cerebellar artery, but not on the right lenticulostriate artery [Figure 1b]. Raw 3D-CTA images showed no enhancement adjacent to the hematoma [Figure 1c]. On retrospective observation of the initial noncontrast and contrast-enhanced (CE) CT, a small low-density region was observed in the hematoma [Figure 1a and c].
(a) Angiography performed on the sixth day showing an aneurysm originating from the right lenticulostriate artery (arrow). (b) Computed tomography after angiography showing an enhanced lesion in the hematoma (arrow). This portion appears identical to the low-density area indicated in Figure 1a and c
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F2
The angiography additionally demonstrated an aneurysm located at the right lenticulostriate artery [Figure 2a]. Retention of contrast medium in the aneurysm was observed on CT obtained after angiography [Figure 2b].
Three-dimensional computed tomographic angiography on the 15th (a) and angiography on the 23rd (b) day showing no aneurysm on the right lenticulostriate artery. (c) Three-dimensional computed tomographic angiography on the 42nd day also showing no lenticulostriate artery aneurysm. (d) Three-dimensional computed tomographic angiography at the 9th month showing no aneurysm on the right lenticulostriate artery
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F3
On magnetic resonance angiography on the 13th day and 3D-CTA on the 15th day, the aneurysm was not opacified on the right lenticulostriate artery [Figure 3a]. Angiography performed on the 23rd day also showed the disappearance of the aneurysm [Figure 3b]. Follow-up 3D-CTA on the 42nd day demonstrated no aneurysm on the right lenticulostriate artery [Figure 3c]. She was transferred to another hospital for rehabilitation for disuse syndrome on the 67th day. 3D-CTA obtained 9 months after onset showed no recurrence of the aneurysm on the right lenticulostriate artery [Figure 3d].