Acetabular retroversion and protrusio

Case contributed by Dr Patsy Robertson

Presentation

Clinical DDH

Patient Data

Age: 16
Gender: Female
Modality: X-ray

Pelvis and Bilateral Hip X-ray

No imaging is available for comparison.

Mild coxa valga deformity of bilateral femora is demonstrated with mild coxa magna. There is a crossover sign of the acetabulum bilateral consistent with acetabular retroversion. Lucency at the junction of the right femoral head and neck laterally may be secondary to impaction (impingement). In addition there is mild protrusio, the inner margin of the acetabulum passing deep to the ilioischial line.

Case Discussion

Acetabular retroversion is a form of acetabular dysplasia and can lead hip pain from adolescence to middle age and to early osteoarthritis.

In this case the medial margin of the acetabulum passes medial to the ilioischial line although the centre edge angel is normal indicating mild protrusio.

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Case Information

rID: 30583
Case created: 20th Aug 2014
Last edited: 26th Nov 2015
Inclusion in quiz mode: Included

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