 There are postoperative findings related to suboccipital craniectomy and C1 laminectomy for decompression of Chiari malformation. The cerebellar tonsils areunchanged in appearance, laying 7 mm below the basion. There are unchanged mildly diminished CSF spaces ventrally and dorsally at the foramen magnum. There is unchanged diminished CSF flow ventrally and dorsally at the craniocervical junction with a retro-odontoid turbulence. There is unchanged tenting of the left dorsal cerebellar surface compatible scarring. The partially imaged pituitary is prominent but within normal limits for age and better assessed on prior dedicated pituitary studies. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There are no areas of abnormal parenchymal signal. 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 paranasal sinuses are unremarkable.
Unchanged postoperative findings related to Chiari decompression with diminished and turbulent flow at the craniocervical junction as well as findings suggestive of an arachnoid adhesion.