Syrinx spine, 4th ventricle stent with hydrocephalus: yearly follow up. Brain: There are postoperative findings related to Chiari decompression with a fourth ventricular stent in position. There is persistent dilatation of the fourth ventricle and mild periventricular T2 hyperintensity. The third and lateral ventricles are nearly collapsed, with bilateral transoccipital ventricular catheters in position. There is an unchanged subcentimeter focus of high T2 signal in the left posterolateral pons. There is high T2 signal suggestive of gliosis and cavitation surrounding the right transfrontal surgical tract. There is no evidence of acute infarction or hemorrhage. There is no midline shift. The calvarium and orbits are unchanged.Spine: There is a persistent holocord syrinx that measures up to 7 mm in width. There is multilevel degenerative spondylosis, which is most pronounced at C4-C5, where a disc-osteophyte complex mildly indents the spinal cord. There is also moderate left and mild right neural foraminal compromise at this level. In addition, degenerative spondylosis at C6-C7 with uncovertebral hypertrophy results in moderate to severe right neural foraminal narrowing. There is no significant spinal canal narrowing at the other cervical spine levels or in the thoracic spine. There is normal vertebral bone marrow signal and the alignment of vertebral column is unchanged. The paraspinal soft tissues are unremarkable, aside from postoperative alterations in the upper cervical region posteriorly.
1. Postoperative findings related to Chiari decompression and fourth ventricular stenting with persistent dilatation of the fourth ventricle, while the third and lateral ventricles are nearly collapsed, with bilateral transoccipital ventricular catheter in position. 2. Unchanged nonspecific subcentimeter lesion in the left posterolateral pons. 3. Persistent holocord syrinx.4. Degenerative spondylosis in the cervical spine.