6-year-old male with history of brain abscess related to mastoiditis, status post resection. There are unchanged postoperative findings related to prior right tympanomastoidectomy and temporal craniotomy. There is unchanged high signal within the mastoidectomy bowl consistent with fluid. There is an unchanged T2 hypointense rim-enhancing lesion in the right inferior temporal lobe along the mastoid roof, which measures up to 14 mm. There is confluent high T2 signal in the adjacent white matter, which is also unchanged. No new lesions are identified. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits are grossly unremarkable. There are skin-based fiducial markers.
Postoperative findings related to right mastoidectomy and temporal craniotomy without significant change in size right temporal lobe chronic abscess or granuloma and associated vasogenic edema.