Özet:

Extraneural ganglion cysts of the peroneal nerve have rarely been in the literature. This paper reports a large extraneural ganglion cyst compressing the peroneal nerve and causing pain in the leg, and foot drop. Electromyographic study revealed a deep peroneal nerve lesion, but the superficial branch was spared. Magnetic resonance imaging showed a cystic tumor located below the superior tibiofibular joint. A complete surgical resection was undertaken. During surgery multimodal intraoperative neurophysiological monitoring was performed. An extraneural ganglion cyst should be considered in the differential diagnosis of painful foot drop. Electrophysiological and radiological studies should be carried to rule out other causes of foot drop

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