 The ventricles are mildly prominent, as are the anterior subarachnoid spaces. 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. No extra-axial fluid collection is identified.Normal flow-voids are demonstrated in the major intracranial vascular structures. The midline structures and craniocervical junction are within normal limits. There is left mastoid air cell and middle ear fluid opacification. Incidental note is made of a small oval-shaped T2 hyperintense structure along the left lateral supraorbital region, along the adjacent frontozygomatic suture, which measures 11 x 6 mm in greatest axial dimensions on 601/17. This demonstrates dropout of signal on axial fat saturated postcontrast images without enhancement. It demonstrates heterogeneous T1 hypointense signal and mild diffusion restriction.Anterior to the expected location of the anterior fontanelle, just the right of midline, there are some asymmetrically prominent cortical veins along the dural surface, as seen on 1403/75 and 1402/32-33. Fontanelle patency is difficult to assess on MRI. Probable benign enlargement as arachnoid spaces of infancy.The intracranial internal carotid arteries are normal in course and caliber. The middle and anterior cerebral arteries are unremarkable. The vertebral arteries, basilar artery, and posterior cerebral arteries are normal in course and caliber. The right vertebral artery is dominant. There is no evidence of flow-limiting stenosis or aneurysm
1. Unremarkable contrast enhanced MRI of the brain and noncontrast MRA head.2. Incidental small probable left lateral orbital dermoid/epidermoid.3. Probable benign enlargement of subarachnoid spaces of infancy which should resolve by 2 years of age. Follow-up imaging may be obtained as clinically indicated.4. Anterior to the expected location of the anterior fontanelle, incidental note made of asymmetrically prominent cortical veins to the right of midline. Please correlate with physical exam.