 There are unchanged mildly low-lying cerebellar tonsils. There are stable postoperative findings related to suboccipital craniectomy and posterior fossa shunting. There is no acute infarct, mass effect, or acute hemorrhage. There are minimal bilateral cerebral convexity subdural effusions. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The skull and extracranial soft tissues are unchanged. There is hardware related susceptibility effect from anterior fusion of C5-6.
Minimal bilateral cerebral convexity subdural effusions may indicate low intracranial pressure. Otherwise stable postoperative findings related to Chiari decompression.I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.