Arthroscopic management of the thrower's shoulder: internal impingement.

Our understanding of internal impingement in the overhand athlete is an evolving body of knowledge. More recent improved understanding of the pathophysiology of events that leads to the spectrum of injury has caused us to refine our techniques of treatment. Improved surgical techniques and instrumentation have made refinement of our approach to treatment possible. Only time will tell whether the perceived understanding of these disorders, resulting in alteration of our treatment methods, is making our treatment outcomes more successful.