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Figure 2: Right vertebral artery digital subtraction angiography anteroposterior (a) and lateral (b) views demonstrating the V4 segment dissection and associated intracranial pseudoaneurysm (arrow). (b) The excrescence (arrow), denoting the point of rupture, is seen emanating from the intracranial pseudoaneurysm. (c) Magnified lateral view again showing dissection associated narrowing of vertebral artery proximal to posterior inferior cerebellar artery (double arrows), the large ruptured intracranial pseudoaneurysm (arrow), and a second smaller sack distal to the posterior inferior cerebellar artery origin

Figure 2: Right vertebral artery digital subtraction angiography anteroposterior (a) and lateral (b) views demonstrating the V4 segment dissection and associated intracranial pseudoaneurysm (arrow). (b) The excrescence (arrow), denoting the point of rupture, is seen emanating from the intracranial pseudoaneurysm. (c) Magnified lateral view again showing dissection associated narrowing of vertebral artery proximal to posterior inferior cerebellar artery (double arrows), the large ruptured intracranial pseudoaneurysm (arrow), and a second smaller sack distal to the posterior inferior cerebellar artery origin