Ruptured aneurysm at an anastomotic artery extending from the vertebral artery to the posterior inferior cerebellar artery: a case report.
A 51-year-old hypertensive man presented with subarachnoid haemorrhage. He had a past history of cerebellar infarction due to occlusion of the right posterior inferior cerebellar artery (PICA) 4 years earlier. Digital subtraction angiography showed a saccular aneurysm above an arterial loop extending from the vertebral artery to the distal part of the PICA, reminiscent of peripheral PICA branches. We performed aneurysmal neck clipping with excellent outcome. Aneurysms at anastomotic arteries are extremely rare and can result from increased haemodynamic stress. We report the first case of a ruptured aneurysm at an anastomotic artery in the posterior circulation territory.
Department of Neurosurgery, Amakusa Medical Center, Kumamoto, Japan.
Jun
J
Matsumoto
Shozaburo
S
Uemura
Aiko
A
Hayasaki
Hiroshi
H
Kimura
Motohiro
M
Morioka
Jun-Ichi
J
Kuratsu
D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging* / Q000601:surgery; D015901:Angiography, Digital Subtraction; D002531:Cerebellum / Q000098:blood supply*; D002533:Cerebral Angiography; D004058:Diffusion; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging* / Q000601:surgery; D013525:Surgical Instruments; D014711:Vertebral Artery / Q000000981:diagnostic imaging* / Q000601:surgery