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Figure 6: (a) Left vertebral angiogram showing large aneurysm arising from right P2–P3 with no filling of distal posterior cerebral artery (PCA) but microcatheter injection (b and c) opacified distal branches. Distal branch cannulated with microcatheter (d) and arrow pointing toward it. Coiling of distal branch done (e and arrow points toward coil in distal PCA) and then feeding PCA which was coiled (f). Postcoiling angiogram showed trapping of aneurysm (f and g). Left ICA angiogram (h and i) postcoiling revealed collaterals from MCA to PCA territory (i) arrow pointing toward collaterals)

Figure 6: (a) Left vertebral angiogram showing large aneurysm arising from right P2–P3 with no filling of distal posterior cerebral artery (PCA) but microcatheter injection (b and c) opacified distal branches. Distal branch cannulated with microcatheter (d) and arrow pointing toward it. Coiling of distal branch done (e and arrow points toward coil in distal PCA) and then feeding PCA which was coiled (f). Postcoiling angiogram showed trapping of aneurysm (f and g). Left ICA angiogram (h and i) postcoiling revealed collaterals from MCA to PCA territory (i) arrow pointing toward collaterals)