 Brain: There are postoperative findings related to the Chiari decompression with interval resolution of the pseudomeningocele. Protrusion of the right cerebellar tonsil through the neo-foramen magnum to the lower margin of the anterior arch of C1 appears unchanged. There also appears to be mild patchy T2 hyperintensity in the inferior right cerebellar hemisphere and fine linear bands that extend from the posterior surface of the inferior right cerebellar hemisphere to the overlying dural patch. CSF flow is present across the anterior and posterior aspects of the neo-foramen magnum, although the anterior flow column remains slightly constricted due to the retroflexed dens. The third and lateral ventricles are mildly prominent. The basal cisterns remain patent. There is no midline shift or mass effect. There is no evidence of acute infarct or hemorrhage. Cervical Spine: The cervicothoracic syrinx has decreased in size and cranial extent, but is incompletely imaged inferiorly. The syrinx now extends from the inferior aspect of the C6 vertebral body and has a maximal width of 4 mm at the level of T4, previously 8 mm. The vertebral column alignment is within normal limits. The vertebral body and disc space heights are preserved. The vertebral bone marrow signal is unremarkable. There is no significant spinal canal stenosis.
1.Postoperative findings related to Chiari I decompression with interval resolution of suboccipital pseudomeningocele, but fine linear bands that extend from the posterior surface of the inferior right cerebellar hemisphere to the overlying dural patch may represent adhesion formation.2.Decrease in size and cranial extent of syrinx.3. The third and lateral ventricles are dilated.I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.