 There is mild prominence of the subarachnoid spaces anteriorly and along the anterior falx most consistent with benign enlargement of the subarachnoid spaces. 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 and mastoid air cells are clear. There is no abnormal enhancement within the brain. Bilateral incomplete partitioning at the cochlear apex with coalescence of the apical and middle turns is better demonstrated on the separately acquired temporal bone CT. Images of the internal auditory canals demonstrate the seventh and eighth nerves to be normal in size and symmetric bilaterally without masses or enhancing lesions along the course of these nerves or in the cerebellopontine angle cisterns bilaterally. There are no vascular anomalies.
1.MRI findings most consistent with benign enlargement of the subarachnoid spaces, which typically resolves by 2 years of age.2.Bilateral incomplete partitioning at the cochlear apex with coalescence of the apical and middle turns is better demonstrated on the separately acquired temporal bone CT. 3.The seventh and eighth nerves are normal in size and symmetric bilaterally without masses or enhancing lesions along the course of these nerves or in the cerebellopontine angle cisterns bilaterally.