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Figure 1: (a): Pre-operative digital subtraction angiography (DSA) showed a small dissecting aneurysm involving the posterior inferior cerebella artery (PICA). (b): Three-month follow-up DSA showed disappearance of the aneurysm while the PICA is preserved

Figure 1: (a): Pre-operative digital subtraction angiography (DSA) showed a small dissecting aneurysm involving the posterior inferior cerebella artery (PICA). (b): Three-month follow-up DSA showed disappearance of the aneurysm while the PICA is preserved