Published online Dec 18, 2016. doi: 10.5312/wjo.v7.i12.776
Peer-review started: April 28, 2016
First decision: May 17, 2016
Revised: September 14, 2016
Accepted: October 5, 2016
Article in press: October 7, 2016
Published online: December 18, 2016
Core tip: “Internal impingement” is a term used to describe a constellation of symptoms which result from the greater tuberosity of the humerus and the articular surface of the rotator cuff abutting the posterosuperior glenoid when the shoulder is in an abducted and externally rotated position. The pathophysiology in symptomatic internal impingement is multifactorial, involving physiologic shoulder remodeling, posterior capsular contracture, and scapular dyskinesis. Mainstays of treatment include intense non-operative management focusing on rest and stretching protocols focusing on the posterior capsule.