Status post tumor resection, headache. Examination is motion degraded and limited to non-contrast sequences. Interval postsurgical changes of right frontal craniotomy for tumor resection are seen. There has been resection of the tumor involving the right superior frontal gyrus and cingulate gyrus as well as removal of the previously seen cystic component posterolaterally. Air and blood products are seen in the surgical cavity. There is a FLAIR hyperintensity surrounding the surgical bed. There is restricted diffusion along the margin of the resection cavity, particularly inferiorly compatible with cytotoxic edema. Some component of the restricted diffusion corresponds to blood products. Again seen is effacement of the right frontal horn, which is improved in the interval. There is mild leftward subfalcine herniation. Again seen is mild asymmetric enlargement of the left lateral ventricle. No uncal herniation. No hydrocephalus. Major flow-voids are preserved.
1. Expected postsurgical changes of right frontal craniotomy for resection of previously seen nonenhancing infiltrative and partially cystic neoplasm. There appears to be gross total tumor resection. There are areas of FLAIR hyperintensity surrounding the resection cavity which may represent postoperative edema with small component of residual tumor not excluded. 2. There is small areas of restricted diffusion compatible with cytotoxic edema inferior and to a lesser degree lateral and superior aspects of the resection cavity which may transiently enhance on follow-up studies.