PMC8769388_01
(A and B) Preoperative cerebral angiography and MIP images showing basilar-tip aneurysm and a TPA from left posterior cerebral artery (arrow). (C) Postoperative cerebral angiography showing patent TPA (arrow head). (D) DWI showing high intensity within the right mesial thalamus (arrows). DWI: diffusion-weighted image, MIP: most intensive picture, TPA: thalamoperforating artery.
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F1
She underwent coil embolization of the aneurysm with the double catheter technique, but without balloon or stent assistance (Figs. 1A and 1B). A cerebral angiography performed after coil embolization depicted a single dominant TPA, known as the artery of Percheron (AOP), arising from the left posterior cerebral artery which was patent (Fig. 1C). Her anterograde amnesia resolved 12 hours after coil embolization and a diffusion-weighted image (DWI) revealed a high-intensity signal within the right mesial thalamus (Fig. 1D).
PMC8769388_02
(A and B) Preoperative cerebral angiography and MIP images showing basilar-tip aneurysm and thalamoperforating arteries (arrows) from bilateral PCAs. (C) Postoperative cerebral angiography showing patent TPA (arrow head). (D) DWI showing high intensity within bilateral anterior nucleus of thalamus (arrows). DWI: diffusion-weighted image, MIP: most intensive picture, PCAs: posterior cerebral arteries, TPA: thalamoperforating artery.
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F2
An unruptured basilar-tip aneurysm gradually developed with a bleb (Fig. 2A). TPA originating from the bilateral posterior cerebral arteries (PCAs) (Fig. 2B). The patient underwent a stent-assisted coil embolization and a subsequent cerebral angiography showed that the TPA was patent (Fig. 2C). Her anterograde amnesia disappeared 14 hours after coil embolization and a DWI revealed a high-intensity signal within the bilateral anterior nucleus of the thalamus (Fig. 2D).