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Pre-radiosurgical and post-radiosurgical angiography show spontaneous regression of untreated feeding pedicular aneurysm after GKS. A : On angiographic examination of GKS, an aneurysm is detected at the distal feeding pedicualr artery. B : Fifty months after irradiation, angiography demonstrating obliterated nidus of AVM and related aneurysm. AVM : arteriovenous malformation, GKS : Gamma-knife radiosurgery.
