PMC5364924_01
A: An axial computed tomography (CT) scan of the head showing no subarachnoid hemorrhage. B, C: Right carotid angiograms demonstrating an irregularly shaped aneurysm (arrow) at the junction of the internal carotid artery and the posterior communicating artery.
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F1
A plain computed tomography (CT) scan of the head reveal no abnormality such as a giant intracavernous aneurysm, subarachnoid hemorrhage, or a parasellar tumor (Fig. 1A). A cerebral angiogram showed a vertically long aneurysm measuring approximately 10 mm in its longest dimension with complicated bulges projecting postero-infero-laterally (Fig. 1B, C).
Intraoperative photographs. A: Only a part of the aneurysm was present in the cisternal portion. The oculomotor nerve (arrowhead) was identified behind the aneurysm. B: The aneurysm was clipped, but the tip of the aneurysm could not be directly confirmed.
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F2
Two-thirds of the aneurysm dome was buried behind the dura and projected toward the lateral cavernous sinus (Fig. 2A). No evidence of subarachnoid hemorrhage was observed, and the aneurysm was successfully obliterated with a clip (Fig. 2B).