 There are postoperative changes related to left frontal craniotomy for resection of a left frontal lobe mass. There is marginal susceptibility along the resection cavity as well as along the residual anterior left frontal lobe parenchyma, consistent with chronic hemosiderin deposition likely from the prior surgery. There is also diffuse smooth dural enhancement in the left frontal region with mild thickening, also likely postoperative in etiology. There has been interval near-resolution of enhancement along the margins of the resection cavity otherwise. There is no significant interval change in the extent of the mildly expansile T2 hyperintense infiltrative mass in the left frontal lobe surrounding the resection cavity with extension across the corpus callosum into the right frontal lobe. However, there is also increased patchy T2 hyperintensity in the white matter of the bilateral cerebral hemispheres, which may be treatment related. There is mild mucosal thickening in the right frontal sinus and left ethmoid air cells. The orbits are unremarkable.
Evolution of postoperative findings related to left frontal mass resection without convincing evidence of tumor progression.