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Korean J Intern Med > Volume 28(4); 2013 > Article
Erol, Bağçacı, Küçük, and Albayrak: Rheumatoid pannus compressing the medulla oblongata
A 47-year-old woman with a 33-year history of rheumatoid arthritis (RA) visited our outpatient clinic complaining of numbness in her hands and progressive weakness in all four extremities. She had urinary incontinence for 1 month. On physical examination, she had joint deformities due to RA in all four extremities. The deep tendon reflexes were hyperactive and she was quadriparetic. Cervical spine magnetic resonance imaging revealed periodontoid pannus formation that had destroyed the C1 and C2 vertebrae bodies and compressed the medulla oblongata (Fig. 1).
We administered three infusions of 1,000 mg of methylprednisolone intravenously to relieve her symptoms. However, the response to the steroid pulses was poor. A neurosurgeon recommended surgery, but the patient refused. Antitumor necrosis factor (anti-TNF) therapy was contraindicated because the patient had active pulmonary and urinary infections. At follow-up, her neurological symptoms were unchanged.
Typically, RA affects synovial joints. Spinal involvement generally presents in the cervical spine. Myelomalacia can develop with compression of the cervical spinal cord by periodontoid pannus. Recently, the treatment of RA has become more effective and the development of periodontoid pannus has become very rare. When patients with RA present with difficulty walking, progressive weakness of all four extremities, spasticity, and neurogenic bladder symptoms, the clinician should consider periodontoid pannus compression.
The literature includes cases of periodontoid pannus treated successfully with surgery. In addition, two cases were treated successfully with infliximab. Therefore, anti-TNF therapy in the early stages of rheumatoid myelopathy might obviate the need for surgery.

Conflict of interest

No potential conflict of interest relevant to this article is reported.
Figure 1
A T2-weighted magnetic resonance imaging of the sagittal cervical spine shows compression of the medulla oblongata by periodontoid pannus (shown by the arrow).
kjim-28-512-g001.jpg
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