Diagnosis: Other specified hearing loss, right earClinical question: assess for retrocochlear pathologySigns and Symptoms: asymmetric SNHL of right ear; h/o facial trauma one year ago The CSF spaces are appropriate for the patient's stated age with no midline shift. The cerebellar tonsils are low lying.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.No 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. The acetabular aqueducts do not appear enlarged. There is no evidence for dehiscent some of the superior semicircular canal.No abnormal enhancing lesions are appreciated at the cerebellopontine angle cisterns nor the internal auditory canals.
MRI of the brain and IACs are within normal limits. No abnormal lesions are identified within the internal artery canals. 