Figure 6.

A 74-year-old female with pelvic pain. (a) AP pelvic X-ray: right pubic bone fracture (arrow). (b) Right one-leg stand: vertical instability of pubic symphysis (arrow). (c) Left one-leg stand confirms instability (arrow). (d) Axial computed tomography: bilateral sacral ala fractures (arrows). (e) Coronal computed tomography: same fractures. (f) Mid-sagittal computed tomography: normal. (g) Postoperative AP pelvic X-ray: transsacral bar and two iliosacral screws posteriorly, two plates and screws anteriorly. Marginal screws of the upper plate use infraacetabular corridor, anterior plate is angular stable. (h) Pelvic inlet. (i) Pelvic outlet