PMC9699833_01
Computed tomograms on admission showing bilateral subarachnoid hemorrhage (SAH) with a hematoma in the left frontal sulci (middle and right). No SAH is seen in the basal cistern (left).
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F1
CT of the brain showed SAH over a wide area of the bilateral convexal regions and a hematoma in the left frontal sulci [Figure 1].
(a) Three-dimensional computed tomographic angiograms showing no clear source of hemorrhage. A small aneurysm arising from the left internal carotid artery (arrow) appears to be unruptured. (b) Magnetic resonance angiograms at discharge showing no clear source of hemorrhage.
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F2
An aneurysm of the left internal carotid artery was identified, which had been previously indicated, but it appeared to be unruptured based on the SAH distribution [Figure 2a]. No hemorrhage sources were seen on MR images at the time of discharge [Figure 2b].