History of inflammatory pseudotumor: worsening headache. There is no significant interval change in the high T2 signal lesion involving the periaqueductal portion of the midbrain, with extension into the bilateral posterior thalami. There is no associated abnormal enhancement. There is a right transfrontal ventricular catheter with mild surrounding gliosis. The ventricles and basal cisterns are unchanged in size and configuration. There are scattered punctate foci of susceptibility effect in the ventricles, which may be related to prior hemorrhage. There is no evidence of acute infarction. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits are unremarkable. There is a left maxillary sinus retention cyst.
1. No significant interval change in the lesion involving the periaqueductal portion of the midbrain, with extension into the bilateral posterior thalami.2. Unchanged appearance of the shunted ventricular system. 