Normally, the ball glides smoothly within the socket, but a problem with the ball or socket rim can interfere with smooth motion, leading to hip impingement or femoro acetabular impingement (FAI).

warwick.ac.uk Introduction Femoroacetabular impingement (FAI) syndrome is increasingly recognised ... Previous hip injury such as acetabular fracture, hip dislocation or femoral neck fracture; ...

So what we've gotten to understand is a concept of what we call "femoral-acetabular impingement," or "hip impingement," where the ball and the socket get a pinching with activity and range of motion.

DALLAS — The Dallas Stars will be without one of its marquee names for the next few months. The team announced Wednesday that forward Tyler Seguin would be undergoing surgery to repair a left ...

More specifically, Christina De Nicola of MLB.com reports that Head will require a left femoral acetabular impingement procedure. He’s expected to resume baseball activities in roughly three ...