title: De novo intracranial aneurysm formation after Gamma Knife radiosurgery for vestibular schwannoma.
abstract: Vascular complications, including vessel occlusion and hemorrhage, can arise after radiosurgery; however, hemorrhage due to a ruptured de novo aneurysm after Gamma Knife radiosurgery (GKS) for tumor is extremely rare. To the authors' knowledge, only a single case of de novo aneurysm formation after GKS for vestibular schwannoma has been previously reported. In this study, they describe their experience with the treatment of a 74-year-old woman with subarachnoid hemorrhage limited to the cerebellopontine cistern, who had undergone GKS for vestibular schwannoma 5 years earlier. Cerebral angiography demonstrated a left distal anterior inferior cerebellar artery aneurysm; coil embolization was attempted and failed. However, self-resolution of the aneurysm was revealed on follow-up angiography.
authors.affiliation: Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.
authors.forename: Keun Young
authors.initials: KY
authors.lastname: Park
authors.forename: Jung Yong
authors.initials: JY
authors.lastname: Ahn
authors.forename: Jae Whan
authors.initials: JW
authors.lastname: Lee
authors.forename: Jong Hee
authors.initials: JH
authors.lastname: Chang
authors.forename: Seung Kon
authors.initials: SK
authors.lastname: Huh
mesh_terms: D000368:Aged; D002526:Cerebellar Diseases / Q000209:etiology*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000209:etiology*; D009464:Neuroma, Acoustic / Q000601:surgery*; D016634:Radiosurgery / Q000009:adverse effects*; D013345:Subarachnoid Hemorrhage / Q000209:etiology