 Internal Auditory Canals: The right semicircular canals are dysplastic in association with a markedly diminutive semicircular bone island. In addition, the cochlear nerve is markedly deficient. The left inner ear structures and cranial nerve 7 and 8 complex are intact. There is no evidence of mass lesions in the temporal bones.Brain: There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma and pituitary gland appear unremarkable. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, and scalp soft tissues are grossly unremarkable. There are scattered inflammatory changes in the paranasal sinuses.
Dysplastic right semicircular canals and right cochlear nerve deficiency.