 Mild prominence of the ventricles and sulci are appropriate for age. The cerebellar tonsils are in normal position. There are no masses, mass effect or midline shift. The pituitary gland is normal in size. There is no evidence for intracranial hemorrhage or acute cerebral, brainstem or cerebellar infarction. No diffusion-weighted abnormalities are identified. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. The paranasal sinuses are clear. Fluid signal material is noted in bilateral mastoid air cells. There is no abnormal enhancement within the brain. There is a 10 mm transverse x 5 mm AP x 4 mm craniocaudal enhancing mass within the distal left internal auditory canal, completely intracanalicular in location, without extension beyond the porous acusticus. Images of right internal auditory canal demonstrates the seventh and eighth nerves to be normal in size and symmetric bilaterally without masses or enhancing lesions. The inner ear structures are normal in appearance and symmetric bilaterally without congenital inner ear anomalies identified on either side. There are no vascular anomalies.
1.There is a 10 mm transverse x 5 mm AP x 4 mm craniocaudal enhancing mass within the distal left internal auditory canal, completely intracanalicular in location, without extension beyond the porous acusticus.2.Fluid signal material is noted in bilateral mastoid air cells.