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J Korean Neurosurg Soc. 2010 Mar;47(3):232-4. doi: 10.3340/jkns.2010.47.3.232. Epub 2010 Mar 31.

L2 radicular compression caused by a foraminal extradural gas pseudocyst.

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Department of Neurosurgery, Wooridul Spine Hospital, Seoul, Korea.


Gas pseudocysts are a rare cause of lumbar radiculopathy and most symptomatic gas pseudocysts are found within the confines of the spinal canal. A gas pseudocyst in the foramen causing lumbar radiculopathy is very rare. We present a case of a 67-year-old woman suffering from severe pain in the right leg. Computed tomography and magnetic resonance imaging revealed a gas pseudocyst compressing the L2 root at the right L2-3 foramen. The patient underwent cyst excision using the lateral transmuscular approach and her leg pain was improved after the operation.


Gas pseudocyst; Lumbar vertebra; Radiculopathy

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