Sex Differences in Femoroacetabular Impingement

Ali Ashraf, MD; Rafael J. Sierra, MD; and Amy L. McIntosh, MD

Femoroacetabular impingement (FAI) is the term given to the mechanism by which two abnormal structural morphologies of the hip may lead to osteoarthritis (OA). FAI can result in early cartilage damage and labral tears, eventually leading to primary OA of the hip.

The two structural deformities that encompass FAI are the cam type and the pincer type morphologies. The two morphologic characteristics coexist in approximately 60 percent to 80 percent of cases, but isolated cam or pincer morphologies can be present and determine the sequence and type of damage that occurs in the hip joint.

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