Acetabula Protrusio
The Hologic DXA image of the left hip shows acetabula protrusio.

The accompanying radiograph shows the left acetabula protrusio.

This is a patient with acetabular protrusion. The right hip would need to be used for the DXA scan. Protrusio acetabuli can be primary and is often associated with osteoarthritis. It may also be familial. Secondary causes include Paget’s disease, psoriatic arthropathy, rheumatoid arthritis, ankylosing spondylitis, osteomalacia and rickets, osteogenesis imperfecta, Marfan syndrome, trauma, and hemophilia.
Sarah L Morgan, MD, RD, CCD, The University of Alabama at Birmingham
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