Intracranial and spinal fluid collections in superficial siderosis on MRI

(A) T2-weighted axial MRI showing a postoperative posterior fossa fluid collection (arrows). Also note hemosiderin deposition along cerebellar folia and around brainstem (dashed arrows).
(B, C) Sagittal T2-weighted spine MRI showing an extensive ventral cervical (B) and thoracic (C) epidural fluid collection (arrows).
(D) Sagittal T2-weighted lumbar spine MRI from a patient with SS who had a spinal cord stimulator placed showing a dorsal epidural fluid collection (arrows).
(E) Sagittal T2-weighted lumbar spine MRI showing a sacral meningocele and dural ectasia (arrows).