16-year-old male with Chiari malformation and syrinx, annual evaluation for progression. Redemonstrated are postoperative findings related to Chiari surgery, stable in appearance. The cerebellar tonsils assume an unchanged configuration and morphology. Biphasic CSF flow is again noted at the level of the cerebellar tonsils, not significantly changed in appearance. A retroflexed odontoid tip somewhat narrows the adjacent subarachnoid space, however without cervicomedullary abutment or deformation, unchanged.There is no significant interval change in the size and extent of the syrinx that involves the cervical and thoracic spinal cord, as well as the conus medullaris. Maximal AP dimension at the C7/T1 level measures 3 mm, stable.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. The paravertebral soft tissues are unchanged.
Postoperative findings related to Chiari decompression with unchanged syringohydromyelia.