Posttraumatic pseudomeningocele and superficial siderosis

74-year-old man who had cervical spine surgery done 25 years prior.
(A) Axial T2-weighted MRI showing hemosiderin deposition along the cerebellar folia and around the brainstem (dashed arrows). Sagittal (B) and axial (C) T2-weighted cervical spine MRI showing the right C7 pseudomeningocele (arrows). Also note hemosiderin deposition around the cord (dashed arrow). (D) Axial image from a CT myelogram showing communication (arrowhead) of the pseudomeningocele (arrow) with the thecal sac.