Fig. 1

Plain and contrast-enhanced CT scans of the aneurysm in the present case. A A plain CT on admission in the present case. Arrow indicates the massive hemorrhage and the devoid of hemorrhagic signal (asterisk) in the right MCA region. Arrowheads indicate the prominent midline shift to the left hemisphere. B A plain CT on admission. The hemorrhagic lesion was extended to the surrounding parenchyma involving the caudate and lentiform nuclei (arrows). C A contrast CT shows the presence of an aneurysm located at the right MCA region (asterisk) and subarachnoid hemorrhage (arrowheads). D A stereographic reconstitution of the contrast head CT depicting the fusiform structure of MCA aneurysm (arrow: 21 × 13 × 12 mm in size)