Fig. 6—

26-year-old man with acute onset of groin pain. Case supports role of femoroacetabular impingement surgery in appropriate clinical setting and absence of joint degeneration and cartilage loss.

A, Anteroposterior radiograph of pelvis shows preserved joint space and cam deformity (arrow).

B, Midcoronal proton density–weighted MR image shows focal superior cartilage defect (arrowhead) and perilabral ossification (asterisk). Overall, no extensive joint degeneration was detected.

C, Ten years after surgical hip dislocation, cam resection, and acetabular rim trimming with labral refixation, patient presented with tenderness over greater trochanter but no clinical signs of impingement. Radiograph shows no evidence of progression of osteoarthritis.