121 patients suffering from lumboradicular syndrome were examined for the presence of varicella zoster virus (VZV) infection. Lumbar myelography was carried out on all. VZV-antibody determination in blood, as well as in spinal fluid, was by indirect ELISA. In 40% of cases lumbar myelography revealed no signs of a herniated disc; none had raised antibody titre in spinal fluid. VZV-antibody titre in blood indicated VZV infection in only 3.