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Fig 2. A 30-year-old man presenting with signs of stem compression 3 years after initial presentation of brain stem infarction. A, Initial MR angiogram reveals focal asymmetric dilation in the distal basilar artery. B, CT angiogram 3 years after initial MR imaging as a result of brain stem compression. A large asymmetric pseudoaneurysm is demonstrated in the same location. C, Vertebral angiogram in lateral projection after overlapping double-stent deployment shows flow redirection through the stent and the basilar artery with stasis of contrast media in the pseudoaneurysmal sac (arrows). D and E, A 4-month follow-up vertebral artery angiogram (D) and right internal carotid artery angiogram (E) reveal occlusion of the basilar artery and hypertrophied right posterior communicating artery (arrow), which supplies the distal basilar artery and its branches.
