The link back to FAIS comes down to mechanics. Every repeated instance of impingement - the compression between the femur and the socket we covered earlier - places extra stress on the same cartilage and labral tissue that hip osteoarthritis eventually erodes. 

Pincer morphology sits on the acetabular side of the hip joint.

Cam morphology describes a change to this shape: extra bone forms at the front and top of the femoral head-neck junction and the femoral head loses some of its natural roundness.

To reach a diagnosis, patients should have the appropriate symptoms of FAIS, positive clinical signs and imaging findings to corroborate the diagnosis. 

Femoroacetabular Impingement Syndrome (FAIS) is a motion and compression-related disorder of the hip involving unhealthy contact between the acetabulum and the femur.

Tendinopathy is the broad umbrella term used to describe pain and dysfunction in a tendon, regardless of the underlying pathology.

Dorsal wrist impingement (also known as dorsal capsulitis) is a condition involving irritation and inflammation of the soft tissues at the back of the wrist.