title: Ruptured partially thrombosed anterior inferior cerebellar artery aneurysms: two case reports and review of literature.
abstract: Aneurysms arising from the distal anterior inferior cerebellar artery (AICA) are very rare. When the parent artery is an AICA-posterior inferior cerebellar artery (PICA) variant, occlusion of the artery, even distal to the meatal loop, leads to a significant area of cerebellar infarction. We report two cases of ruptured partially thrombosed distal AICA aneurysms. In both cases, the parent artery was an AICA-PICA variant. The aneurysms were clipped in one case and trapped following occipital artery (OA)-AICA anastomosis in another case. It is important to keep the OA as a donor artery for revascularization in the treatment of the AICA-PICA variant aneurysms, especially when the absence of intra-aneurysmal thrombus is not comfirmed preoperatively.
authors.affiliation: Department of Neurosurgery, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan.
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Kanamori
authors.affiliation: 2Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan 3Medical Corporation Wakoukai, Kawashima Hospital, Nagoya, Japan.
authors.forename: Teppei
authors.initials: T
authors.lastname: Kawabata
authors.affiliation: 2Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan 3Medical Corporation Wakoukai, Kawashima Hospital, Nagoya, Japan.
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Muraoka
authors.affiliation: Department of Neurosurgery, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan.
authors.forename: Takao
authors.initials: T
authors.lastname: Kojima
authors.affiliation: Department of Neurosurgery, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Watanabe
authors.affiliation: Medical Corporation Wakoukai, Kawashima Hospital, Nagoya, Japan.
authors.forename: Norikazu
authors.initials: N
authors.lastname: Hatano
authors.affiliation: Department of Neurosurgery, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Seki
keywords: anastomosis; aneurysm; anterior inferior cerebellar artery; revascularization; thrombosed