Review ArticleNormal and Pathoanatomy of the Arthritic Shoulder: Considerations for Shoulder ArthroplastyGetz, Charles L. MD; Ricchetti, Eric T. MD; Verborgt, Olivier MD, PhD; Brolin, Tyler J. MDAuthor Information From the Department of Orthopaedic Surgery (Dr. Getz), Rothman Institute-Thomas Jefferson University Hospitals, Philadelphia, PA, the Department of Orthopaedic Surgery (Dr. Ricchetti), Cleveland Clinic, Cleveland, OH, the Department of Orthopaedics & Traumatology (Dr. Verborgt), Antwerp Orthopedic Center, AZ Monica, Antwerp, Belgium and the Department of Orthopaedic Surgery (Dr. Brolin), Campbell Clinic-University of Tennessee Health Science Center, Memphis, TN. None of the following authors or any immediate family member has received anything of value from or has stock or stock options held in a commercial company or institution related directly or indirectly to the subject of this article: Dr. Getz, Dr. Ricchetti, Dr. Verborgt, and Dr. Brolin. Journal of the American Academy of Orthopaedic Surgeons: December 15, 2019 - Volume 27 - Issue 24 - p e1068-e1076 doi: 10.5435/JAAOS-D-18-00414 Metrics Abstract The glenohumeral joint is a highly mobile, complex articulation that relies not only on the bony support between the humeral head and glenoid but also on appropriate balance and tension of the surrounding soft-tissue structures. Recreating the normal anatomic relationships is a basic premise in joint arthroplasty, which can be challenging in shoulder arthroplasty, as the normal glenohumeral anatomy has considerable variation from patient to patient. Also, as the anatomy of the glenohumeral joint becomes distorted with advanced shoulder pathology, it becomes a challenge to return the shoulder to its premorbid anatomic state. Failure to restore normal anatomic parameters after shoulder arthroplasty has been shown to have deleterious effects on postoperative function and implant survival. As the recognition of this has grown, shoulder prostheses have evolved to allow for considerable more variation in an attempt to recreate patient-specific anatomy. However, understanding the progression of shoulder pathology to better predict the patient's premorbid anatomy remains limited. A thorough understanding of the premorbid and pathologic anatomy of the glenohumeral joint will aid in preoperative planning and intraoperative execution and lead to a more predictable reconstruction of the shoulder, which is critical for a successful outcome after shoulder arthroplasty. Copyright 2019 by the American Academy of Orthopaedic Surgeons.