Evaluate etiology of headache, positional component: history of right mastoidectomy, lumbar drain. MRI: There are postoperative findings related to right mastoid obliteration with fat graft. There is fluid within the remaining pneumatized portions of the right temporal bone. There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma and pituitary gland appear unremarkable. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. There appears to be mild prominence of the bilateral optic nerve sheath cerebrospinal fluid.MRV: There is constriction of the bilateral transverse sinuses. There is otherwise no evidence of venous sinus thrombosis.
1. Postoperative findings related to right mastoid obliteration with fat graft. There is fluid within the remaining pneumatized portions of the right temporal bone, which may represent persistent cerebrospinal fluid leakage or effusions. 2. A partially empty sella, mild prominence of the bilateral optic nerve sheath cerebrospinal fluid, and constriction of the bilateral transverse sinuses are suggestive of pseudotumor cerebri.