JOURNAL ARTICLE

The natural history of spondylolysis and spondylolisthesis: 45-year follow-up evaluation

William J Beutler, Bruce E Fredrickson, Albert Murtland, Colleen A Sweeney, William D Grant, Daniel Baker
Spine 2003 May 15, 28 (10): 1027-35; discussion 1035
12768144

STUDY DESIGN: A prospective study of spondylolysis and spondylolisthesis was initiated in 1955 with a radiographic and clinical study of 500 first-grade children.

OBJECTIVE: To determine the natural history of spondylolysis and spondylolisthesis.

SUMMARY OF BACKGROUND DATA: Most studies on the natural history of spondylolysis and spondylolisthesis are based on patient populations presenting with pain. Critical to any natural history investigation is the study of a population of affected individuals, whether symptomatic or not, from onset of the condition through their lives.

METHODS: By study of a population from the age of 6 years to adulthood, 30 individuals were identified to have pars lesions. Data collection at a 45-year follow-up assessment included magnetic resonance imaging, a back pain questionnaire, and the SF-36 Survey.

RESULTS: No subject with a pars defect was lost to follow-up evaluation once a lesion was identified. Subjects with unilateral defects never experienced slippage over the course of the study. Progression of spondylolisthesis slowed with each decade. There was no association of slip progression and low back pain. There was no statistically significant difference between the study population SF-36 scores and those of the general population the same age.

CONCLUSIONS: This report is the only prospective study to document the natural history of spondylolysis and spondylolisthesis from onset through more than 45 years of life in a population unselected for pain. Subjects with pars defects follow a clinical course similar to that of the general population. There appears to be a marked slowing of slip progression with each decade, and no subject has reached a 40% slip.

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