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[Transsacral approach to lumbosacral extraforaminal disc herniations].

Neuro-Chirurgie 2005 December
INTRODUCTION: The lateral approach is classically used for surgical treatment of extraforminal disc herniations (EDH). However, its use at the level of the L5-S1 space can require more or less extensive resection of the facet joint. This study reports our experience in the treatment of L5-S1 EDH using the transsacral approach described by Muller and Reulen in 1998.

MATERIAL AND METHODS: From February 2002 to October 2004, 12 patients presenting EDH at the L5-S1 level underwent treatment using the transsacral approach. There were 8 men and 4 women. Mean age was 55 years (range: 36 to 75 years). All patients presented lumbalgia and L5radiculalgia. Only one patient had dysesthesia. Five patients presented motor deficits and 3 presented sensory deficits. Surgical treatment was proposed after failure of medical treatment and two L5 corticoids infiltrations.

RESULTS: All patients were re-examined two months after the procedure. Mean follow-up was 15 months. Complete resolution of radiculalgia with no paresthesia was achieved in all patients. Patients presenting preoperative motor deficit recovered fully after treatment. All patients resumed normal activity.

CONCLUSION: The transsacral approach is a valid alternative to the lateral approach for treatment of L5-S1 EDH. The amount of operative exposure achieved using this technique is sufficient to avoid joint injury that can result in chronic postoperative lumbalgia. Another advantage is that excision of the protruding disc fragment can be achieved without mobilization of the nerve root or dorsal root ganglion, thus avoiding postoperative dysesthesia.

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