Pelvic ring fractures - acetabulum and pubic rami

Case contributed by Leonardo Lustosa
Diagnosis certain

Presentation

Fall from a 3-meter height. Right hip pain.

Patient Data

Age: 70 years
Gender: Male

The right iliopectineal line is disrupted, indicating a fracture of the anterior acetabular column.

(See annotated image below)

CT confirms the fracture of the anterior acetabular column which contributes to a comminuted fracture of the acetabular roof.

CT also revealed superior and inferior right pubic rami fractures which were initially missed by the radiograph.

The iliopectinal line is drawn bilaterally.

On the right, the line drawn in red is interrupted, a sign of pelvic ring fractures which may be present in acetabular fractures and superior pubic rami fractures, for example.

On the left, the line drawn in green is uninterrupted.

Case Discussion

Acetabular fractures are a subgroup of pelvic fractures. Pelvic fractures are related to pelvic trauma with a risk of grave hemorrhage. If a pelvic fracture is suspected, proper physical examination and radiographic studies are extremely important.

The initial radiograph performed on this case identified a pelvic ring fracture as noted by the abnormal right iliopectineal line.

A CT was performed, which further revealed right superior and inferior pubic rami fractures.

Initial radiograph imaging may underestimate pelvic ring fractures, in order to improve identification of possible fractures, it is often useful to assess the following lines to check for abnormalities:

  • iliopectineal line

  • ilioischial line

  • teardrop

  • roof of acetabulum

  • edge of the anterior acetabular wall

  • edge of the posterior acetabular wall

  • Shenton line

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