Neuroradiological evaluation of lateral recess syndrome.

Fifty asymptomatic patients and 35 with surgically proved lateral recess syndrome (LRS) were studied retrospectively to determine the depth of the normal and abnormal lateral recess. Plain radiography, polytomography, CT, and myelography of the lumbosacral area were performed. The normal and abnormal ranges are presented and the role of the various radiographic procedures in the diagnosis of LRS is discussed.