Abstract
The synovial cyst of the spine may be caused by degenerative changes or instability of the spine. The most common site of spinal synovial cyst is the lumbar spine. If conservative management is failed, the operation must be considered. So far, microscopic cyst removal has been considered a treatment of choice. Recently, biportal endoscopic surgery is now becoming increasingly common in spine surgery and has the advantage of minimizing damage to related structures such as muscle, bone, and nerve. There was a case in which the synovial cyst of the L4–5 level was successfully removed through a biportal endoscopic surgery, so we would like to report it with a literature review.
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