Fig. 2

CAM type deformity (Blue arrow): prominence in the anterosuperior aspect of the proximal femur at the level of the head-neck junction in the right hip of a 31 year old footballer accompanied by a small os acetabuli at the margin of the acetabulum (Yellow arrow). In this case, the CAM prominence causes a loss of sphericity of the femoral head and a ‘bumpy‘ head neck-junction