Hemangioblastomatosis. There are postoperative findings to posterior fossa surgery with a defect in the medial left cerebellar hemisphere. There has been interval increase in size of the enhancing nodular anterior bifrontal interhemispheric lesions, which collectively measure up to 16 mm in width, previously 13 mm. There is extensive surrounding vasogenic edema in the bilateral frontal lobes. Likewise, multiple infratentorial enhancing lesions with surrounding vasogenic edema have increased in size. For example, a superior right cerebellar hemisphere lesion measures up to 10 mm in thickness, previously 7 mm. There is also a lesion in the left aspect of the upper cervical spine that measures up to 11 mm. There are scattered nonspecific foci of cerebral white matter hyperintensity separate from the vasogenic edema. There is no evidence of intracranial hemorrhage or acute infarct. 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. The orbits, skull, and scalp soft tissues are grossly unremarkable. There is a right maxillary sinus retention cyst.
Overall interval increase in size of the lesions related to hemangioblastomatosis. 