The past decade has brought significant change to the understanding, evaluation and treatment of shoulder trauma. This issue of Orthopedic Clinics of North America dedicated to shoulder trauma will discuss these current developments and provide guidance on the clinical and technical applications of these advancements. A nationally and internationally renowned group of authors will share their experiences and expertise. This issue includes the articles:: Proximal humerus fractures:: imaging and classification by LtCol Damian M. Rispoli, MD; Intramedullary nail fixation for proximal humerus fractures by Jeffery Hughes MBBS; Percutaneous fixation of proximal humerus factures by Matthew Ramsey, MD; Open reduction and internal fixation of proximal humerus fractures by Darren Drosdowech, MD and Kenneth Faber, MD; Hemiarthroplasty for proximal humerus fractures by Sumant Krishnan, MD; Reverse total shoulder arthroplasty for proximal humerus fractures by Joseph Iannotti, MD; Glenoid and scapular fractures by Steven Papp, MD; Management of proximal humerus nonunions and malunions by John Sperling, MD; Neurovascular injuries in shoulder trauma by Scott Steinmann, MD; Management of acute clavicle fractures by Michael McKee, MD; Anterior glenohumeral joint dislocations by Frank Cordasco, MD; Posterior glenohumeral joint dislocations by William Levine, MD; Acromoclavicular and sternoclavicular joint injuries by Peter MacDonald, MD.