Extra-articular hip impingement

...what are the most common types?

Extra-articular hip impingement (EHI) is a growing subset of - largely unrecognized - pain generators, that is gaining more recognition due to poor outcomes following hip arthroscopy of intra-articular hip impingement (IHI).

The current study took a narrative approach to presenting the knowledge currently available regarding EHI. In contrast to IHI, EHI is caused by abnormal contact between regions of the proximal femur and the pelvis outside of the hip capsule.


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