PMC5159691_01
Initial sagittal non-contrast computed tomography scan showing S1-S2 fracture (a). Preoperative lateral X-ray demonstrating S1-S2 fracture (b)
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F1
The scans revealed an S1-S2 transverse fracture caused by her previous sacral pedicle screws [Figure 1a and b].
Initial sagittal non-contrast computed tomography (CT) scan showing S1-S2 fracture (a). Postoperative lateral X-ray demonstrating reduction of S1-S2 fracture (b). A 5-year, postoperative, reconstructed three-dimensional CT scan (c and d)
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F2
Anteroposterior (AP) and lateral C-arm images were used to confirm accurate placement of pins [Figure 2a and b]. On subsequent follow-up appointments, CT images demonstrated bony fusion of the sacrum with the last appointment 7 years postoperatively [Figure 2c and d].