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Summary of bypasses used to treat dolichoectatic basilar trunk aneurysms and the evolution in surgical management from extracranial-intracranial bypasses (superficial temporal artery (STA) to superior cerebellar artery (SCA) or posterior cerebral artery (PCA), Phase 1) to intracranial-intracranial bypasses with interposition grafts (V3 segment of vertebral artery (VA) to SCA, Phase 2, and middle cerebral artery (MCA) to PCA, Phase 3).
