Video TechniqueArthroscopic Internal Fixation of Symptomatic Os AcromialeCohen, Marcio MD; Monteiro, Martim MD; Fonseca, Raphael MD; Pereira, Marcelo R. MD; Zaluski, Alexandre MDAuthor Information National Institute of Orthopedics and Traumatology (INTO-RJ), Rio de Janeiro, Brazil The authors declare no conflict of interest. Reprints: Marcio Cohen, MD, National Institute of Orthopedics and Traumatology (INTO-RJ), Rua Almirante Guilhem 127, Leblon, Rio de Janeiro (RJ) 22440-000, Brazil (e-mail: firstname.lastname@example.org). Techniques in Shoulder & Elbow Surgery: June 2020 - Volume 21 - Issue 2 - p 54-56 doi: 10.1097/BTE.0000000000000191 Buy SDC Metrics Abstract The meso-acromion is the most common type of os acromiale and has been associated with subacromial impingement and rotator cuff tears. Surgical treatment might be indicated when nonoperative treatment has been nonsuccessful and depends on the size and location of the os acromiale. Numerous surgical procedures have been described in the current literature, most of them focusing on the os acromiale union. To this, fusion rates depend mostly on the surgical approach and fixation technique and when achieved, is generally associated with good clinical outcomes. The purpose of this article is to describe our preferred technique of internal fixation for a symptomatic meso-type os acromiale. An all-arthroscopic technique has the advantages of optimal visualization of the undersurface of the acromion and nonunion site minimizing morbidity of the open approach. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.