PMC3327002_01
Magnetic resonance imaging performed 13 days after the symptom onset. (a) T2-weighted axial image at the mid-pons level demonstrating a thin blood collection adjacent to the clivus and both petrous bones. (b) T1-weighted axial image at the lower medulla level showing a thin blood collection at the retroclival area. (c) T1-weighted sagittal image showing a thin blood collection located in the retroclival and the dural lining along the occipital bone
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F1
This blood accumulation extended to the cervical spine level with cerebrospinal fluid intensity inside the subarachnoid space [Figure 1].
Computed tomography-angiography performed 15 days after ictus demonstrated the presence of an aneurysm with two lobes. One lobe was directed in an inferior-posterior manner, whereas the other exhibited an inferior-medial orientation and was attached to the right dorsum sellae
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F2
The medial lobe of the aneurysm was attached to the right dorsum sellae [Figure 2].
Postembolization cerebral angiography (a: antero-posterior view, b: lateral view) demonstrated good embolization
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F3
The aneurysm was embolized successfully [Figure 3].