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CSF cytology and HIV serology were both negative. EMG, however, confirmed the clinical findings of polyradiculopathy. T1W and T2W MRI of the lumbar spine demonstrated diffuse thickening of the nerve roots of the cauda equina, which enhanced following intravenous gadolinium administration (Figs. 1 and 2). No parenchymal involvement was seen.
Bounded by these elements, the nerve. roots exit laterally. Unlike the lumbar spine, the cervical. spine has cervical nerve roots that exit above. the level of the corresponding pedicle. For. instance, the C5 nerve root exits at the C4-. C5 disk space, and a C4-C5 disk herniation. typically leads to C5 radiculopathy. There are. seven cervical vertebrae and eight cervical. nerve roots. In the lumbar spine, the nerve. Cervical radiculopathy is a disease process marked by nerve com-. pression from herniated disk material or arthritic bone spurs.