34 year old female patient status post craniectomy for Chiari. Post-surgical changes of a suboccipital craniectomy with interval resolution of a previously seen extradural postoperative fluid collection. The posterior fossa structures are well decompressed. There is biphasic CSF flow at the level of the neo-foramen Magnum and cerebellar tonsils both ventrally and dorsally, appearing similar to the prior study.Redemonstration of a partially empty sella.Again seen is mild developmental narrowing of the cervical spine without otherwise significant spinal canal or neural foraminal stenosis. Vertebral body heights are preserved. There is mild loss of the cervical lordosis which may be in part positional. There is no syrinx or cord signal abnormality.
1. Post-surgical changes of a suboccipital craniectomy with decompressed posterior fossa structures and preserved biphasic CSF flow at the neo-foramen Magnum.2. No cord signal abnormality or syrinx.3. Partially empty sella which is non-specific but can be seen with intracranial hypertension in the appropriate clinical setting. This finding has been present since MRI from 3/24/2014. 