 There are no T2/FLAIR abnormalities. There are no diffusion or susceptibility abnormalities. Ventricular size is normal without midline shift. Basal cisterns are patent. No evidence of herniation. Vascular flow voids are unremarkable.Partially empty sella is noted which can be a normal variant. There is prominence of the CSF spaces at the posterior fossa with minimal if any effacement of the adjacent cerebellar parenchyma. There is also a small arachnoid cyst involving the right middle cranial fossa abutting the right anterior temporal pole.There is mild mucosal thickening of the right maxillary sinus and minimal opacification elsewhere. Calvarium and extra cranial soft tissues are unremarkable.
There is prominence of the CSF spaces at the foramen magnum which may represent a mega cisterna magna or an arachnoid cyst. Finding is of doubtful clinical significance. Partially empty sella is also noted which can be a normal variant. Small right middle cranial fossa arachnoid cyst is also incidentally noted. Brain MRI is otherwise unremarkable without evidence of suspicious intracranial masses, edema, hemorrhage, or herniation.