Please evaluate for malformations, hydrocephalus, or tumors: speech delay, macrocephaly, 5 cafe-au-lait spots one large (12x15cm). Brain: The lateral ventricles and third ventricle are diffusely prominent. The cerebral aqueduct and fourth ventricles are intact. There is a left medial middle cranial fossa arachnoid cyst that measures 15 mm in width. There is a mega cisterna magna. 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 is a normal degree of myelination. There is no abnormal intracranial enhancement. Orbits: The globes and ocular adnexa are intact. No intraorbital enhancement or mass is identified. The extraocular muscles are intact. The lacrimal glands are symmetric and within normal limits in size and configuration. The optic nerves are grossly unremarkable.
1. Prominence of the triventricular system and a left middle cranial fossa arachnoid cyst. Otherwise, no stigmata of neurofibromatosis type 1, intracranial tumors, or hemorrhage. 2. Unremarkable orbits.