A 24-year-old man presented to the ED following a scooter collision. He had multiple abrasion wounds on his extremities and complained of right hip pain. Physical examination revealed mild limitation of the right hip joint and difficulty walking. Plain film radiography was performed (figure 1).

Pelvic radiography, posteroanterior view, indicating the possible diagnosis.

What abnormality can be observed?

Pelvic fracture

Femoral neck fracture

Slipped capital femoral epiphysis

Anterior superior iliac spine (ASIS) avulsion fracture

For answer see page 02

For question see page 01

Answer: A

The plain radiograph showed a hyperdense line on the right ilium (figure 2), absent on the opposite side, suggesting a possible pelvic fracture. …