Intermittent vertigo for the last 5 years. Evaluate for acoustic neuroma or other anomalies. There is a vascular loop within the right internal auditory canal, a frequent incidental finding, most likely representing the AICA. The internal auditory canals are otherwise grossly symmetrical in size and signal intensity without definite abnormal enhancement within the cerebellopontine angle, cisterns bilaterally or within the internal auditory canals.There is no evidence of intracranial hemorrhage, mass, or acute infarct. There are scattered punctate foci of abnormal T2/FLAIR hyperintensity within the periventricular and subcortical white matter, which are nonspecific. There is no pathological enhancement. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The skull and extracranial soft tissues are unremarkable.
1. No specific lesions are seen within the cerebellopontine angle, cisterns or internal auditory canals to suggest the presence of a schwannoma, or any other cause for the patient's symptoms.2. No evidence of intracranial hemorrhage, mass, or acute infarct.