Right Bell's Palsy. 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 a small left ethmoid sinus retention cyst.
No evidence of right facial nerve inflammation, tumor, or acute brainstem or cerebral infarction.