11 year old female with history of Chiari malformation status post decompression 12/2012, with headaches and back pain Again seen are postsurgical changes of suboccipital craniectomy and C1 laminectomy for Chiari decompression. CSF spaces at the level of the foramen magnum are patent ventrally and dorsally. The cerebellum abuts the dura dorsally. No tonsillar herniation is evident. CSF flow analysis shows good biphasic anterior and posterior flow. Visualized intracranial structures show no hydronephrosis or other abnormality.Alignment of the spine is anatomic with intact vertebral body heights and disk spaces. Signal within the cord and conus is normal, which terminates normally at L2-L3. No significant central canal or neuroforaminal narrowing. No syrinx is evident.
Status post Chiari decompression with preservation of the CSF spaces ventrally and dorsally at the foramen magnum. No syrinx.