PMC3205486_01
Admission axial CT showing extensive thick basal SAH along the interpeduncular, quadrigeminal. and carotid chiasmatic cisterns, with intraventricular extension and early hydrocephalus
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F1
Her initial CT-scan revealed a severe SAH (thick basal SAH with intraventricular extension) [Figure 1].
(a, b) Admission lateral and AP angiographic images demonstrating a broad-based 2.7 mm x 2.5 mm x 1.8 mm aneurysm arising from the ventral aspect of the midbasilar trunk. The right vertebral artery seems to be small and slightly irregular. There is no laterally directed aneurysm that is noticeable
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F2
The aneurysm in the neck measured 2.7 mm in maximum dimension [Figures 2a and b].
Angiography showing a laterally directed, 1.5 mm newly formed sidewall aneurysm, arising from the basilar artery, approximately midway between the AICA and SCA. This aneurysm was inferior to the ventrally located and clipped aneurysm of the week before
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F3
An emergency angiogram demonstrated the growth of a distinct, laterally directed, sidewall aneurysm, arising from the basilar artery, approximately midway between the AICA and SCA [Figure 3].