Sudden right sensorineural hearing loss. There is no evidence of mass lesions. The inner ear structures, including the cochlea, vestibule, endolymphatic duct, and semicircular canals, appear intact, without evidence of abnormal enhancement. The bilateral cranial nerve 7 and 8 complexes are also intact. The bilateral mastoid air cells and middle ears appear unremarkable. There are developmental venous anomalies in the right superior temporal lobe and right parietal lobe periventricular region with an adjacent areas of high T2 signal. There is diffuse prominent dural enhancement, which extends into the bilateral internal auditory canals. There is a right parasellar aneurysm clip. There is encephalomalacia in the right basal ganglia. There is partially-imaged nonspecific scattered cerebral white matter T2 hyperintensity. There is a partially-imaged ventricular catheter device. There area bilateral lens implants and staphylomatous deformity.
1. No evidence of retrocochlear or inner ear lesions.2. Persistent diffuse prominent dural enhancement, which can be a manifestation of intracranial hypotension in the setting of ventricular shunting. 3. Stigmata of right parasellar aneurysm clipping and chronic right basal ganglia infarction.4. Developmental venous anomalies in the right superior temporal lobe and right parietal lobe periventricular region with an adjacent areas of high T2 signal, which may represent gliosis. 