Synovial cyst arising from a lumbar pars defect
Long standing low back pain now presenting with right sciatica
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Lobulatred cystic mass arising in the right L5 pars defect entering the spinal canal to compress the thecal sac and right L5 nerve root sheath
Synovial cysts arising from degenerate facet joints are uncommon but well recognised. In this case a similar appearing cyst has arisen from the pseudoarthrosis that has developed in a chronic L5 pars defect. This is very unusual.
- DePalma MJ, Strakowski JA, Mandelker EM et-al. An instance of an atypical intraspinal cyst presenting as S1 radiculopathy: a case report and brief review of pathophysiology. Arch Phys Med Rehabil. 2004;85 (6): 1021-5. Pubmed citation