TY - JOUR T1 - Steroid Injection Performed with Fluoroscopy for Treatment of a Discal Cyst JF - The Journal of Rheumatology JO - J Rheumatol SP - 1841 LP - 1843 DO - 10.3899/jrheum.090050 VL - 36 IS - 8 AU - TIPHAINE DUMAY-LEVESQUE AU - ANNE-CLAIRE SOUTEYRAND AU - JEAN-LUC MICHEL Y1 - 2009/08/01 UR - http://www.jrheum.org/content/36/8/1841.abstract N2 - To the Editor:Intraspinal extradural cysts that communicate with the intervertebral disk are a rare entity and thus an uncommon cause of lumbar radiculopathy. Several types of lumbar intraspinal cysts with different pathogenesis have been reported, such as perineural cysts, synovial cysts1,2, arachnoid cysts3, epidural hematoma4, cyst of the ligamentum flavum5, ganglion cysts6, intraspinal gas7, and discal cysts8. We describe a discal cyst treated by roentgenography-guided steroid injection.A 35-year-old man presented with lower back pain that gradually worsened over the course of a year. The pain became radicular, and radiated down the lateral portion of his left leg to just above the knee. The neurological examination demonstrated intact sensation along all dermatomal patterns and normal deep tendon reflexes bilaterally. Plain radiographs of the lumbosacral spine revealed minimal degenerative changes, but no signs of spinal segmental instability, deformity, or spondylosis.Magnetic resonance imaging (MRI) revealed an extradural spherical mass 7 × 8 × 10 mm seated in the left ventrolateral epidural space of the spinal canal behind the L3 vertebral body (Figures 1 to 4) that extended into the lateral recess of L4, with low signal intensity on T1-weighted imaging, slight high signal intensity on T2-weighted imaging, and rim enhancement after contrast injection. The cyst displaced the dural sac dorsally. The L3-L4 disk adjacent to the cyst and the … Address reprint requests to Dr. Dumay-Levesque; E-mail: tiphdumay{at}yahoo.fr ER -