INTRASPINAL EXTRADURAL GANGLION CYST

Occurrence of ganglion cysts in the spine is extremely rare. Common sy mptoms include intermittent lumbar pain and pain at night. Neurologica l examination to distinguish from other etiologies of radicular pain m ay be difficult. The L4-L5 level is the most common sight of occurrenc e. Radiographically, degenerative changes, particularly spondylolisthe sis, are a common finding. MRI appearance of the cysts is variable, ac cording to the composition of the cyst. A ganglion cyst should be cons idered in the differential of radicular pain in the presence of degene rative changes of the lumbar spine.