(A) The anteroposterior pelvis radiograph demonstrates medial subluxation of the femoral head with segmental displacement of the iliopectineal line. Ilioischial line displacement is present and, unlike the anterior wall fracture, the relationship of the ischium to the ilioischial line is preserved.
(B) The obturator oblique radiograph appears similar to that seen in the isolated anterior wall fracture but the fracture is seen to be multifragmentary with impaction.
(C) The iliac oblique view shows disruption of the posterior border of the innominate and displacement through the greater sciatic notch.
Reproduced with permission from: Moed BR, Reilly MC. Lower extremity: Acetabulum fractures. In: Rockwood and Green's Fractures in Adults, 7th ed, Bucholz RW, Court-Brown CM, Heckman JD, Tornetta P (Eds), Lippincott Williams & Wilkins, Philadelphia 2010. Copyright © 2010 Lippincott Williams & Wilkins.
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