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Abstract
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.
REFERENCES
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Fig. 1.
Preoperative plain radiographs: (A) standing (lateral view), (B) flexion, and (C) extension (lateral view). The radiographs show spondylolisthesis at L5 on S1 with instability and a neglected L1 spine compression fracture.
Fig. 2.
Postoperative plain lateral radiograph shows the post-reduction state of spondylolisthesis at L5-S1.
Fig. 3.
Plain lateral radiograph taken 4 weeks after the first operation shows a displaced sacral stress fracture just beneath the S1 pedicle screws.
Fig. 4.
(A) Sagittal and (B) axial computed tomography images taken 4 weeks after the first operation show a displaced sacral stress fracture just beneath the S1 pedicle screws.
Fig. 5.
Plain lateral radiograph taken after the second operation shows the well-reduced state of the sacral stress fracture.
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