Secondary glioblastoma on Avastin. There are post-treatment findings in the right frontal lobe related to tumor resection. There is no significant interval change in mildly expansile nonenhancing confluent T2 hyperintensity along the anterior, medial, and posterior margins of the right frontal lobe resection cavity and in the right anterior cingulate gyrus. There is no significant interval change in size of the minimally enhancing ependymal lesion along the lateral aspect of the right frontal horn and the subcentimeter non-enhancing lesion with restricted diffusion along the posteromedial margin of the resection cavity. There is residual gyriform intrinsic T1 hyperintensity in the left cingulate gyrus and paracentral lobule, which likely represents cortical laminar necrosis. There is no evidence of acute territorial infarction. The paranasal sinuses, mastoid air cells, and orbits are unremarkable. The skull and scalp soft tissues appear unchanged.
1.No significant interval change in presumed residual tumor surrounding the right frontal lobe resection cavity and in the right anterior cingulate gyrus. 2.No significant interval change in size of an ependymal lesion along the lateral aspect of the right frontal horn and along the posteromedial margin of the resection cavity.