Giant Vertebrobasilar Fusiform Aneurysm as a Cerebellopontine Angle Mass.

Introduction: According to the literature, a fusiform aneurysm located in the cerebellopontine angle (CPA) is an extremely rare condition.

Case Outline: We report a case of a 59-year-old patient with initial dizziness and left-sided sensorineural hearing loss that had gradually developed over six months. Vertebrobasilar fusiform aneurysm, with intraluminal thrombus, which was displaced to the right cerebellopontine angle, creating mass effect, was diagnosed using brain magnetic resonance imaging and magnetic resonance angiography.