Animation: MR Neurographic image of exiting lumbar spinal nerve in foramen.
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(A) Normal configuration showing the exiting spinal root as seen in routine myelogram, but also showing the configuration of the dorsal root ganglion and the proximal spinal nerve in the distal foramen which is not well seen in other imaging techniques.
(B) 74-year-old man with degenerative scoliosis and L4 radiculopathy. Myelography showed no evidence of nerve root cutoffs. The MR Neurography image demonstrated a severe stenosis in the distal foramen. His symptoms resolved with distal foraminotomy.
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