Status post tumor resection. Compared to MRI dated 5/19/2015, interval postsurgical changes of right temporoparietal craniotomy for resection of previously seen enhancing mass at the right temporo-occipital junction. There is minimal slightly nodular enhancement surrounding the resection cavity which may represent minimal residual tumor. Otherwise the tumor appears to have been completely resected. There is minimal restricted diffusion along the surgical cavity margin as well as separate tiny focus just medial to it compatible with cytotoxic edema. Again seen is vasogenic edema involving the right posterior temporal lobe extending slightly into the occipital lobe. There is small extra-axial collection along the right cerebral convexity and dural enhancement consistent with postsurgical change. There is minimal local mass effect related to the vasogenic edema. No midline shift or uncal herniation. No hydrocephalus. Mild global parenchymal volume loss is noted. Few scattered foci of T2/FLAIR hyperintensity are seen in the bilateral subcortical and periventricular white matter, which are nonspecific, but compatible with mild chronic small vessel ischemic changes. Major flow-voids are preserved. Blood products are seen within the resection bed as well as small amount of pneumocephalus. There is focus of susceptibility consistent with chronic microhemorrhage in the left left temporal lobe, lateral to the temporal horn, which is nonspecific.Sella and orbits are grossly within normal limits. Paranasal sinuses and mastoid cells are clear. Aside from postsurgical changes, bone marrow signal and extracranial soft tissues are within normal limits.
Expected postsurgical changes of resection of previously seen tumor at the right temporo-occipital junction. There is minimal rim of slightly nodular enhancement surrounding the resection cavity which may represent minimal residual tumor. The tumor appears otherwise completely resected. There is surrounding vasogenic edema without midline shift or herniation.