Diagnosis: Dizziness and giddinessClinical question: exclude any possibility of vestibular nerve lesionSigns and Symptoms: vertigo BRAINThe CSF spaces are appropriate for the patient's stated age with no midline shift. No abnormal enhancing mass lesions are appreciated intracranially. No intracranial hemorrhage is identified. No edema is identified within the brain parenchyma.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses demonstrate some small mucous retention cyst in the mild mucosal thickening.. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.Incidental note is made of a small arachnoid cyst behind the cerebellar vermis measuring 20 x 20 mm coronal dimensions. The cerebellar tonsils are low lying. Extend approximately 1 or 2 mm below the level of foramen magnum.IACNo abnormal foci of enhancement are appreciated within the internal auditory canals. The cochlea and semicircular canals appear intact. The cochlear nerve can be followed bilaterally tracking into the cochlea. The modiolus is well formed bilaterally.No abnormal enhancing lesions are appreciated at the cerebellopontine angle cisterns nor the internal auditory canals.
1.There is no evidence for abnormal lesion in the vestibular nerves.2.No abnormal lesions are appreciated intracranially which can explain the patient's vertigo symptoms.3.There is a small arachnoid cyst present in the posterior fossa. This is an incidental finding. Usually these are of little clinical significance