Femoroacetabular Impingement
A structural abnormality causing abnormal contact between the femoral neck and acetabular rim during hip motion.
Full Definition
Femoroacetabular impingement (FAI) is a condition where structural abnormalities of the hip joint cause premature contact between the femoral head-neck junction and the acetabular rim. Two main types exist: cam impingement (aspherical femoral head) and pincer impingement (acetabular overcoverage). FAI can lead to labral tears, cartilage damage, and eventually osteoarthritis. The condition is increasingly recognized in young athletes and requires specialized rehabilitation protocols focusing on hip mobility and neuromuscular control.
Usage
Usage note: Abbreviate as FAI only after first use. Always specify cam-type, pincer-type, or mixed-type when known.
In Context
- "MRI findings confirmed cam-type femoroacetabular impingement with associated labral pathology." — Diagnostic imaging report
- "The rehabilitation program avoided end-range hip flexion to prevent exacerbation of the femoroacetabular impingement." — Treatment modification note