Journal Article Case Reports Digital dynamic radiography Arthroscopy Dynamic digital radiography Dynamic imaging Ehlers-Danlos syndrome Glenohumeral motion Humeral head subluxation Latissimus transfer Multidirectional instability Pectoralis major transfer Posterior instability Posterior shoulder instability Posterior subluxation Quality of life Return to sports Rotator cuff repair Scapular dyskinesia Scapulohumeral rhythm Serratus anterior palsy Shoulder diagnosis Shoulder instability Tendon transfer Young patients