 The cisterns remain patent. There is no midline shift or mass effect. There are no areas of abnormal signal or pathological enhancement. There is no diffusion abnormality. The subarachnoid spaces are enlarged bilaterally along the anterior frontal and temporal lobes, along with prominence of the ventricles. Normal flow-voids are demonstrated in the major intracranial vascular structures. The midline structures and craniocervical junction are within normal limits. MRI of the internal auditory canal shows no abnormal enhancement. Normal T2 signal is identified associated with inner ear structures. Cranial nerves 7 and 8 are intact bilaterally, however the distal left cochlear nerve is similar in size but slightly less T2 hypointense than the right. There is a small area of increased T2 signal within the left middle ear/mastoid.
1.The distal left cochlear nerve is similar in size but with apparent slightly less T2 hypointense signal than the right, and adjacent nerves within the IAC. No definite associated enhancement. This finding is of uncertain clinical significance and could possibly be technical, however correlation with clinical exam and hearing tests are recommended. Unremarkable MR appearance of the inner ear structures.2.Nonspecific small area of T2 signal within the left middle ear/mastoid. This could be further evaluated with CT temporal bone if clinically warranted.3.Enlarged subarachnoid spaces likely represents benign enlargement of the subarachnoid spaces in infancy, which usually resolves by the age of two. Follow-up is recommended.