Male, 4 years old, history of Chiari malformation surgery, annual evaluation, please evaluate CSF flow. The cerebellar tonsils remain pointed and herniate approximately 13 to 14 mm below the level of the foramen magnum, unchanged in extent. As before, there is a slight retroflexion of the dens which abuts the cervicomedullary junction causing slight flattening, unchanged. These abnormalities contribute to effacement of the CSF space at the level of the foramen magnum. On CSF flow imaging, there is attenuated but detectable flow along the anterior aspect of the cord, and minimalflow along the posterior aspect of the cord and the tonsils, unchanged.The spinal cord demonstrates normal signal intensity and caliber throughout. No evidence of syrinx formation is seen. A full complement of normally formed vertebral bodies is seen. No dysraphism is detected. The intervertebral disks are normal. No spinal canal or foraminal narrowing is seen.
1.Stable Chiari I malformation and CSF flow imaging.2.No MRI evidence of spinal cord syrinx.