Unusual Injuries: Quadrilateral Space Syndrome

Athletes with persistent and undiagnosed shoulder pain may suffer from the rare but painful quadrilateral space syndrome. Chris Mallac unravels this complex diagnosis and offers practical treatment solutions. Quadrilateral Space Syndrome (QSS), first described in 1983, is a rare and unusual shoulder pathology primarily seen in male volleyballers, swimmers, and baseball pitchers(1,2). Athletes with QSS are usually 20-40 years of age and repeatedly move their dominant arm into extreme abduction with external rotation ranges because of their sport. This syndrome