31-year-old patient with hydrocephalus and SS secondary to a myxopapillary ependymoma. (A, B) Transverse axial T2-weighted gradient echo images showing infratentorial superficial siderosis. Sagittal T2-weighted (C) and post-contrast T1-weighted (D) images from the lower thoracic and lumbosacral spine showing a large, enhancing myxopapillary ependymoma that causes dural ectasia. Note large epidural veins (arrows) around lower cord and conus medullaris.
