Chiari malformation with syrinx. Please do CINE flow study at foramen magnum. Cervical Spine: The cerebellar tonsils display a pointed configuration and extend approximately 8 mm inferior to the level of the foramen magnum. There is impaired CSF flow across the posterior foramen magnum due to blockage by the cerebellar tonsils. However, there is relatively intact CSF flow across the anterior foramen magnum. There is a partially imaged syrinx that extends from the C1-2 level to at least inferior to the T4 level. The syrinx measures up to 9 x 15 mm in cross-section. There are posterior disc-osteophyte complexes at C5-6 and C6-7 that result in mild spinal canal stenosis. The vertebral body and disc space heights are preserved. The vertebral bone marrow signal is unremarkable. The paravertebral soft tissues are unremarkable.Brain MRA: There is no evidence of significant steno-occlusive lesions or cerebral aneurysms.
1. Chiari I malformation with abnormal CSF flow dynamics in the craniocervical junction and associated large caliber cervicothoracic syrinx. Please refer to the prior thoracic spine MRI report for additional details.2. Disc-osteophyte complexes at C5-6 and C6-7 result in mild spinal canal stenosis. 3. No evidence of cerebral aneurysms.