Meningioma, WHO grade I, status post resection: 3 month follow up. There are postoperative findings related to right anterior cranial fossa extra-axial tumor resection via subfrontal osteotomy with removal of the anterior wall of the right frontal sinus with confluent enhancement in the right frontal bone resection bed and persistent trace nodular dural enhancement along the floor of the resection cavity. There is minimal high T2 signal and apparent mild volume loss in the right frontal lobe white matter adjacent to the resection cavity, which is consistent with encephalomalacia. There are scattered nonspecific foci of high T2 signal elsewhere in the cerebral white matter. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. There is a subcentimeter retention cyst in the left maxillary sinus.
Evolution of postoperative findings related to right subfrontal osteotomy with persistent trace small enhancement along the floor of the resection bed, which may represent minimal residual meningioma, but otherwise with gross total tumor resection.