Female, 43 years old. Severe headache. There is no evidence of acute infarct, intracranial hemorrhage, mass effect or edema. The ventricles and basal cisterns are normal in size and configuration. No abnormal extra-axial fluid collection is identified. The midline structures and craniocervical junction are within normal limits. There are no areas of abnormal signal or abnormal parenchymal/leptomeningeal enhancement. Normal flow-voids are demonstrated in the major intracranial vascular structures. There is scattered mild opacification of the mastoid air cells, right greater than left. There are small left maxillary sinus mucous retention cysts, as well as minimal right maxillary sinus mucosal thickening. The other imaged paranasal sinuses and the orbits are unremarkable.
Normal brain MRI without focal abnormality to account for the patient's symptoms.