Left hyperacusis, 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 a hypoenhancing subcentimeter lesion in the right pituitary lobe. There is a prominent perivascular space in the left temporal stem. There are also minimal scattered T2 hyperintense foci in the cerebral white matter, which are nonspecific. There is no evidence of acute infarction.
1. No evidence of retrocochlear or inner ear lesions.2. A hypoenhancing subcentimeter lesion in the right pituitary lobe likely represents a microadenoma. 