Scapulothoracic arthroscopy is performed to treat scapulothoracic joint disorders, such as scapulothoracic bursitis, snapping scapula, and osteochondroma of the anterior scapula surface, and in the extraction of firearm projectiles. This article describes this treatment using an alternative superomedial portal and modified chicken-wing position to improve access to the scapulothoracic space and thus perform the procedure as safely as possible, with less morbidity and excellent results for the patients. S capulothoracic joint disorders may be characterized according to their etiology. 1,2 The presence of mechanical symptoms may denote a bony protrusion or abnormal morphology of the joint soft tissue 3 or can also be caused by a foreign body. These structural abnormalities frequently result in inflammation, bursitis, and scapular crepitus. In cases without mechanical symptoms, pain is related to the occurrence of overload syndrome, resulting in symptomatic bursitis. The latter phenomenon characteristically occurs in young, active patients and athletes who throw. 4 Scapulothoracic joint arthroscopy was first described by Ciullo and Jones (1,992) and has been continuously improved over time. 5-8 Although its indications are restricted, including snapping scapula syndrome, decompression for scapulothoracic bursitis, foreign From the Sports Medicine Division (P.S.B.