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Transtectal transverse acetabular fracture
6%
180/2838
Vertical shear pelvic ring injury
4%
103/2838
Displaced H-type sacral fracture
2%
43/2838
Associated both column acetabular fracture
86%
2438/2838
Anterior-posterior type III pelvic ring injury
62/2838
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The pelvic spur sign is indicative of a both column acetabular fracture. It is best seen on an AP or obturator oblique x-ray. The spur is the intact portion of the ilium, still attached to the axial skeleton and seen posterosuperior to the displaced acetabulum (typically medially displaced). Illustration A shows the spur sign (arrows) on a CT image, while illustration B shows an obturator oblique of the pelvis and the spur sign is shown with the long tailed arrow (on the left of the image).
4.3
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