Ganglion cysts usually originate from vertebral facet joints in the spine that are often located at the dorsal portion of the facet being usually asymptomatic. In this case, we report a 60 year-old woman presented with suddenly developed lower back pain and right leg foot-drop. Lumbar Magnetic Resonance Imaging examination revealed a large cystic lesion at L5 body level. The cystic lesion was removed with standart microsurgical method. The histopathological findings were consistent with ganglion cyst. To our knowledge, this is the first report of ganglion cyst causing foot-drop without any bleeding in the spine
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