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  • Title: Distal mycotic aneurysm of the AICA mimicking intracanalicular acoustic neuroma.
    Author: DiMaio S, Mohr G, Dufour JJ, Albrecht S.
    Journal: Can J Neurol Sci; 2003 Nov; 30(4):388-92. PubMed ID: 14672274.
    Abstract:
    BACKGROUND: Among cases of cerebellopontine angle lesions, vascular lesions involving the internal auditory canal are extremely rare. We report a distal fusiform mycotic pseudoaneurysm of the anterior inferior cerebellar artery (AICA) that simulated an acoustic neuroma on presentation. METHODS: A 60-year-old woman was investigated for recent onset of acute dizziness. Laboratory and radiographic investigations are presented, as well as the surgical management of the patient and pathological examination of the aneurysm. CONCLUSIONS: An exceptionally rare case of distal mycotic intracanalicular pseudoaneurysm of the AICA with intraluminal thrombus and fusiform anatomy is described. In our review of the literature (1966-present), only five other intracanalicular AICA-aneurysms were encountered, none of which were infectious in etiology. The possible pathophysiologic mechanisms of distal AICA-aneurysms are discussed along with the currently available literature.
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