Cam Femoroacetabular Impingement as a Possible Explanation of Recalcitrant Anterior Knee Pain

Figure 3

Gait analysis. (a) Preoperative. (b) Postoperative. Red line, right lower limb. Blue line, pathologic left lower limb. Preoperative study shows a decrease of the vertical heel contact force (arrow) that could be a defense mechanism to avoid the load in the pathologic limb. Notice the gait pattern normalization after surgery.

(a)

(b)