Left unilateral hearing loss, dizziness. The bilateral cranial nerve 7 and 8 complexes are intact. There is no evidence of mass lesions. The inner ear structures, including the cochlea, vestibule, endolymphatic duct, and semicircular canals, appear unremarkable. The bilateral mastoid air cells and middle ears also appear unremarkable. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There are a few scattered foci of T2 hyperintensity in the cerebral white matter. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift. There is minimal extension of the cerebellar tonsils inferior to the foramen magnum, with an otherwise unremarkable morphology of the tonsils. The major cerebral flow voids are intact. The skull, orbits, and scalp soft tissues are unremarkable. There is moderate mucosal thickening and secretions within the right maxillary sinus.
1. No evidence of retrocochlear or inner ear lesions.2. A few scattered foci of T2 hyperintensity in the cerebral white matter are non-specific, but may represent a demyelinating process, small vessel ischemic disease, or vasculitis, for example. 3. Evidence of right maxillary sinusitis.