title: Dissecting aneurysm in the proximal region of the posterior inferior cerebellar artery presenting as Wallenberg's syndrome--case report.
abstract: A 29-year-old female presented with an unusual case of Wallenberg's syndrome due to a dissecting aneurysm of the posterior inferior cerebellar artery (PICA) manifesting as a sensation of heaviness in the occipital region and vertigo. Magnetic resonance imaging revealed infarction of the lateral aspect of the medulla oblongata. Digital subtraction angiography (DSA) revealed a spindle-shaped dilatation of irregular contour in the proximal portion of the left PICA. Pooling of contrast medium was noted in the venous phase but not double lumen sign. A suboccipital craniectomy confirmed these findings macroscopically. Blood flow meter monitoring before and after proximal clipping of the diseased vessel ensured the safety of the procedure. Follow-up DSA 3 years after surgery revealed no evidence of aneurysm recurrence.
authors.affiliation: Department of Neurosurgery, Showa University School of Medicine, Tokyo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Mizushima
authors.forename: K
authors.initials: K
authors.lastname: Sasaki
authors.forename: N
authors.initials: N
authors.lastname: Kunii
authors.forename: T
authors.initials: T
authors.lastname: Nishino
authors.forename: H
authors.initials: H
authors.lastname: Jinbo
authors.forename: T
authors.initials: T
authors.lastname: Abe
authors.forename: M
authors.initials: M
authors.lastname: Shimazu
authors.forename: K
authors.initials: K
authors.lastname: Matsumoto
mesh_terms: D000328:Adult; D000784:Aortic Dissection / Q000150:complications*; D001158:Arteries; D002531:Cerebellum / Q000098:blood supply*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications*; D014854:Lateral Medullary Syndrome / Q000209:etiology*