Diagnosis: Malignant neoplasm of brain, unspecified site Other postprocedural status(V45.89)Clinical question: 11-year-old male with history of cerebellar juvenile pilocytic astrocytoma, follow-up evaluationSigns and Symptoms: 6 month follow up for changes The patient is status post posterior fossa surgery. A surgical defect is present along the medial aspect of the left cerebellar hemisphere which is stable compared to the previous exam and associated with minor FLAIR/T2 signal hyperintensity and SWI hypointensity at the surgical margins. No abnormal enhancing lesions are appreciated within the brain parenchyma to suggest recurrence.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses are clear. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.
The patient is status post suboccipital craniotomy for tumor removal. The examination is stable when compared to the previous exam. There is no convincing evidence for local recurrence.