Osteoarthritis of the hip with pistol grip deformity

Case contributed by Dr Roberto Schubert

Presentation

Right hip pain. Drehmann sign positive.

Patient Data

Age: 40 years
Gender: Male

Dysplastic acetabulum with insufficient covering of the femoral head. Joint space narrowing, subchondral sclerosis and osteophytes at the femoroacetabular joint. Prominent bump at the antero-superior head-neck junction of the femur (cam deformity, also known as pistol grip deformity of the proximal femur).

Case Discussion

Both cam deformity and hip dysplasia can lead to premature degenerative joint disease. "Bumps" at the femoral head-neck junction may be a cam lesion or represent degenerative osteophytes, it can be difficult to discriminate in the setting of osteoarthritis. 

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