Female, 15 years old, history of Chiari decompression, surveillance imaging. Evaluate flow. Again seen are postsurgical changes of Chiari decompression including suboccipital craniectomy and resection of the posterior arch of C1. The CSF space at the level of the foramen magnum remains preserved. The cerebellar tonsils show a normal rounded morphology. As before they descend to the level of the basion.A syrinx is redemonstrated within the spinal cord beginning at approximately T7 and extending to the conus. Syrinx measures up to 2.7 x 3.1 mm in the axial plane at the T8 level similar to prior. There has been no significant change in craniocaudal extent. Mild prominence of the central canal is again also seen from T7 up to T3 similar to prior. No new cord signal abnormality.Cervical and thoracic alignment is anatomic. Vertebral body morphology is normal. No concerning bone marrow signal abnormality is seen. No spinal canal or neural foraminal stenosis.
1.Status post Chiari decompression with continued patency of the CSF spaces at the level of the foramen magnum and preserved biphasic CSF flow. 2. Stable small thoracic syrinx. No new cord signal abnormality.