A 62-year-old male presented with progressive quadriparesis. Magnetic resonance imaging of the spine revealed a spinal cord syrinx but failed to detect extensive arachnoiditis ossificans noted on insertion of a syringopleural shunt. A postoperative computed tomography scan clearly demonstrated the abnormality and its extent. We present a rare case of syringomyelia resulting from spinal arachnoiditis ossificans and review the relevant literature.
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