 The cerebellar tonsils lie up to 8 mm below the level of the foramen magnum, maintaining a rounded morphology. Biphasic CSF flow is noted posteriorly at the level of the foramen magnum and cerebellar tonsils.The spinal cord is normal in signal and morphology throughout without MRI evidence of syrinx. The conus is normal in signal and morphology and terminates at mid-L1 level. There is no fat within the filum. Upon prone maneuvering, the conus and proximal cauda equinus slightly translates anteriorly.There are no osseous dysplasias, disc pathologies, or stenoses. There are no fractures or subluxations. The marrow signal is benign. The visualized paraspinal contents are unremarkable.
1.The cerebellar tonsils lie up to 8 mm below the level of the foramen magnum providing MRI evidence of Chiari malformation. Biphasic CSF flow is noted posteriorly at the level of the foramen magnum and cerebellar tonsils.2.The spinal cord is normal in signal and morphology throughout without MRI evidence of syrinx.3.No MRI evidence of fatty filum or tethered cord.