Pistol grip deformity of the hip with os acetabuli

Case contributed by Dr Roberto Schubert


Professional hockey player complaining of increasing right hip pain during exercise. Elevation and internal rotation of the hip was painfully limited.

Patient Data

Age: 30
Gender: Male

See below

AP and axial radiographs showed joint space narrowing, subchondral sclerosis and small osteophytes at the femoral head and acetabulum. At the antero-superior femoral head-neck junction, a bony protrusion could be seen. A small os acetabuli was also present (Fig. 1&2). MR arthrography showed a small tear of the acetabular labrum and slight irregularities of the chondral surface in the antero-superior joint socket (Fig. 3). The alpha angle of Nötzli was 63°, indicating femoroacetabular cam impingement.

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Case information

rID: 13802
Published: 18th May 2011
Last edited: 16th Jul 2018
Inclusion in quiz mode: Included

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