H/o right frontal meningioma and posterior fossa medulloblastoma. S/p resections. Examination demonstrates postoperative changes status post right frontal craniotomy, including right frontal pneumocephalus, edema and small amount of blood products and extra-axial fluid collection.Imaging through posterior fossa shows postoperative changes status post suboccipital craniotomy and craniectomy. There is a hyperdense mass in the left cerebellum and adjacent meningeal calcification, which is consistent with the finding on the previous MRI. The previously identified lesion in the left cerebellar peduncle is not visualized because of lack of contrast. There is hypoattenuation bilaterally in the periventricular white matter, which likely represents post radiation change. There is no mass effect or midline shift. The ventricles are normal in size and symmetric.The visualized paranasal sinuses and mastoid air cells are normally pneumatized.
1. Postoperative changes status post right frontal craniotomy, including right frontal pneumocephalus, edema and small amount of blood products and extra-axial fluid collection.2. Left cerebellar mass. Postoperative changes status post suboccipital craniotomy and craniectomy.3. Postradiation change in the periventricular white matter.