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MRI demonstrating pannus-producing spinal cord compression

(A) In extension, the soft tissue mass of intermediate signal intensity (arrows) in replacing the odontoid process filling C1-C2 space, but not causing compression on the thecal sac. (B) In flexion, compression of lateral sac occurring (arrow). (In: Greenberg J. Neuroimaging. Used with permission from McGraw-Hill Education.)

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Associated Disorders

  • Basilar invagination
  • Cerebral vasculitis
  • Cerebral vasculopathy
  • Cervical myelopathy
  • Compression neuropathy
  • Entrapment neuropathy
  • Felty syndrome
  • Myasthenia gravis
  • Myopathy
  • Normal pressure hydrocephalus
  • Normochromic, normocytic anemia
  • Osteoporosis
  • Pachymeningitis
  • Peripheral neuropathy
  • Rheumatoid nodules
  • Rheumatoid vasculitis