 There is redemonstration of postsurgical findings related to right frontal lobe tumor resection. Compared to prior examination, there is increased ill-defined scattered enhancement along the margins of the treated tumor sites in the bilateral anterior frontal lobes. There is also diffuse diffusion restriction and edema involving the bilateral anterior frontal lobes. However, relative cerebral blood volume in the region of the soft tissue is not significantly elevated. Otherwise, there is redemonstration of mild volume loss in the right temporal lobe. Ex vacuo dilatation of the anterior and of the right lateral ventricle is again demonstrated. The third ventricle remains dilated.
Persistent scattered areas of enhancement along the margins of the treated tumor involving the bilateral frontal lobes, where there is also confluent restricted diffusion and edema. The findings are suggestive of Bevacizumab-induced diffusion-restricted lesions associated with the treated glioma versus less likely tumor progression. 