Definition:
Femoroacetabular Impingement (FAI) or hip impingement syndrome is a condition affecting the hip joint in young and middle-aged adults. Impingement occurs when the ball shaped femoral head rubs abnormally or doesn't have full range of motion in the acetabular socket. Damage in the hip joint can occur to the articular cartilage or the labral cartilage (soft tissue bumper of the socket). Treatment options vary from conservative treatment to arthroscopic and open surgery.