Abstract
Between Apr. 1992 to Sep. 1999, there were 209 cases of patients (75 men and 134 women) were having degenerative spondylolistesis upon whom we performed semi-circumferential decompression operation without fusion at our hospital. The mean age at the time of the operation was 68.5 years (41 to 87 years). 57 cases had Cauda equina symptoms, 83 cases had Radicular pain, and 69 cases had both Cauda equina symptoms and Radicular pain (Combined). The mean slip angle was 3.4 degree in cases with cauda equina symptoms, 3.3 degree in cases with radicular pain, and 3.9 degree in cases with combined symptoms. The percentage of slip was 13.4% in cases with cauda equina symptoms, 14.2% in cases with radicular pain, and 15.6% in cases with combined symptoms. The ROM was 10.5°in cases with cauda equina symptoms, 7.9°in cases with radicular pain, and 11.7°in cases with combined symptoms. Disc height was 7.2mm in cases with cauda equina symptoms, 5.0mm in cases with radicular pain, and 5.1mm in cases with combined symptoms. These studies show no correlation between the symptoms and the radiographic findings.
