 Interval right temporal craniotomy changes are demonstrated related to partial resection of peripherally enhancing right medial temporal lobe lesion. Small amount of intrinsic T1 signal is noted within the resection cavity. Medial to the resection cavity, there is persistent T2 hyperintensity with peripheral rim enhancement related to residual tumor in the posterior right parahippocampal gyrus. Gradient susceptibility related to hemosiderin deposition is demonstrated within the surgical cavity. There is no diffusion restriction to suggest acute or subacute ischemia. No midline shift is appreciated. No intra-axial or extra-axial fluid collections are visualized. Mild scattered patchy mucosal thickening is demonstrated within the paranasal sinuses. Small amount of fluid is again seen in the right mastoid air cells. Extracranial fluid collection at the craniotomy site measures approximately 7 mm in thickness.
1. Interval postsurgical changes related to subtotal resection of medial right temporal lobe mass are demonstrated.2. Mild scattered patchy paranasal sinus mucosal thickening with small amount of fluid in the right mastoid air cells.