Tarlov cyst or perineural cyst is a local dilation of the subarachnoid space formed within the nerve root and filled with cerebrospinal fluid. There is no consensus on the best treatment of syntomatic sacral perinervous cysts. Many methods have been used to treat these symptomatic lesions, with variable results. We report a case series including 20 patients undergoing surgery for sacral Tarlov cyst. Our results were satisfactory; 80% of patients improved without neurological worsening in the post-operative period. Our surgical technique (sacral laminectomy+cyst puncture+establishment of dural sheat) described for the first time in this study seems to have been effective in the 20 cases reported in our study.
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