 Susceptibility artifact somewhat limits evaluation of the tissues immediately surrounding the craniotomy site secondary to a metallic plate. There are postoperative findings related to recent resection of left cerebellar lesion, with foci of gas and blood products within the resection cavity. There is persistent T2 hyperintensity in the surrounding cerebellum, but decreased mass effect on the fourth ventricle when compared to the prior MRI. There is persistent herniation of cerebellar tissue through the previous craniotomy defect. There is a stable amount of blood products and a small fluid collection at the craniotomy site. There are persistent areas of peripheral enhancement surrounding the resection cavity, which are suspicious for residual disease. There is an unchanged appearance of the known right parietal lesion with surrounding edema, measuring 13 x 13 mm in axial cross-section. The subcentimeter right cerebellar lesion is again identified, but is less conspicuous than on the previous MRI. Normal flow-voids are demonstrated in the major intracranial vascular structures. There are nonspecific fluid levels in the maxillary and sphenoid sinuses. There is staphylomatous deformity of the bilateral globes.
1.Postoperative findings related to recent resection of left cerebellar mass with areas of peripheral, but irregular enhancement in the resection bed, particularly anteriorly, which are suspicious for residual tumor.2.Persistent right parietal and cerebellar metastatic lesions.