A variation of the spinal stenosis problem occurs when there is compression of an isolated root in a spondylotic . Patients present much with similar complaints as in acute , but the time course is protracted and the onset has usually been gradual. Patients complain of or femoral pain in the accepted distribution of a single root. Sometimes root involvement is bilateral and occasionally more than one root on one side is affected. However, the syndrome is not of but of ongoing root compression. That is, the pain tends to be constant, although it is often exacerbated by activity, being upright and axial loading. The associated , motor and relate to the individual root. A positive straight-leg raising is unusual, which is different, than the tension sign of the acute disc herniation. Diagnosis is made by MRI and CT, which visualize the neural foramina and the compression of the nerve root.

There is little evidence that any will benefit such patients, but if the pain is tolerable and there is no major , then a thorough trial of an individualized programme is indicated. If the rehabilitation programme is not effective and pain is intractable, or if there are associated , then surgery should proceed. The operation consists of decompression through adequate . The outcome of surgery should be as good as that enjoyed for acute disc herniation.