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: Intolerable Low Back Pain Due to Ossification of the Ligamentum Flavum at the L5 S1 Level

37-year-old man presented with low back pain and leg pain. A CT scan identified ossification of ligamentum flavum (OLF) at the L5–S1, causing foraminal stenosis. AnL5 nerve root block resolved his low back pain and leg pain completely. However, the symptoms recurred after the effect of the local anesthetic wore off. Because of persistent and intolerable low back pain, he underwent surgery, partial facetectomy and removal of the ossified ligaments followed by posterior instrumented fusion at L5–S1. Histopathology of the specimen revealed no apparent degenerative changes in the ligament. The patient’s symptoms had disappeared completely at the final follow-up.


For More Information: Odate S, Shikata J, Kimura H, Amano S, Tsunemitsu Soeda A (2012) Intolerable Low back pain due to Ossification of the Ligamentum Flavum at the L5-S1 level. J Spine Neurosurg 1:2.

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