Benign neoplasm of brain, unspecified [D33.2], Reason for Study: ^Reason: Inflammatory pseudotumor; f/u progression History: Headaches There is no evidence of acute ischemic lesion on this scan.Previously seen non enhancing bilateral mesial thalami lesions with high T2/FLAIR signal intensity are again seen, no change since prior scan.Multifocal susceptibility lesions on bilateral hemispheres are seen which indicate possible small chronic hemorrhagic foci, however, there are a couple of new lesions especially on the left occipital lobe and parahippocampal gyrus posterior aspect (series 1002, image 14/35) indicate interval development. Since there is no associated surrounding edema, they are again most likely non-acute likely chronic lesions.There is no abnormal enhancement seen. The ventricles, sulci and cisterns are symmetric and unremarkable with ventriculostomy tube inserted through the right frontal burr hole, no change since prior scan. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, restricted diffusion/acute ischemia, or abnormal contrast enhancement. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The mastoid air cells are clear. Left maxillary sinus shows a retention cyst.
1. No evidence of acute ischemic lesion.2. No change of bilateral mesial thalami lesion in terms of extent and MR characteristics.3. Interval increase of the number of susceptibility lesions as described above.4. Stable ventricle size and ventriculostomy tube location.