Chiari malformation. Status post decompression. Annual follow-up of syrinx. Cervical spine:There are postoperative findings related to Chiari decompression surgery. The cerebellar tonsils display an unchanged configuration and position. There is preserved biphasic flow across the anterior neo-foramen magnum. There is mild but easily detectable CSF flow across the posterior craniocervical junction which is unchanged. There is a long-segment cervicothoracic syrinx which is not significantly changed in the cervical region since the previous examination.There is unchanged loss of the usual cervical lordosis and a small posterior disc-osteophyte complex at C5-6 without significant spinal canal stenosis. The vertebral bone marrow signal characteristics are unchanged without suspicious focality. There is no vertebral body height loss. Thoracic spine:The thoracic component of the syrinx is stable to slightly improved in some areas. There is no significant thoracic degenerative disease. The vertebral bone marrow signal characteristics are unchanged without suspicious focality. There is no vertebral body height loss.
1.Unchanged postoperative findings related to Chiari decompression. The CSF space at the foramen magnum is well expanded and CSF flow is seen both anterior and posterior to the spinal cord and brainstem.2.Stable to mildly improved cervicothoracic syrinx.