Sudden left ear hearing loss. 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. There is mild fluid within the right mastoid air cells. The left mastoid air cells and middle ears appear unremarkable.
No evidence of retrocochlear or inner ear lesions.