Sacral Stress Fracture Developing after Lumbosacral Fusion in a Patient with Spondylolisthesis: A Case Report

ABSTRACT

OBJECTIVES@#To report a case of sacral stress fracture that developed after lumbosacral fusion.SUMMARY OF LITERATURE REVIEW Sacral stress fractures rarely develop after lumbosacral fusion, and osteoporosis, female sex, being over 60 years old, and long segment fusion are known risk factors.@*MATERIALS AND METHODS@#A 66-year-old woman with spondylolisthesis at L5 on S1 underwent posterior lumbar interbody fusion and posterior instrumentation. A sacral stress fracture was found 4 weeks after the first operation, and we performed posterior reduction and posterior instrumentation with S2 alar screws.@*RESULTS@#The patient was free from symptoms and no further displacement was found at 3 months after the last operation.@*CONCLUSIONS@#Sacral stress fracture after lumbosacral fusion can be treated with posterior reduction and posterior instrumentation with S2 alar screws.