Journal Article Acromial morphology Acromiohumeral distance Arthroscopic capsular release Baseball Critical shoulder angle Etiological factors Frozen shoulder Glenohumeral internal rotation deficit Humeral torsion Lateral acromial angle Manipulation under ultrasound-guided cervical nerve root block Partial shoulder tears Posterior tightness Recurrence Risk factor Secondary frozen shoulder Shoulder pain Stiffness Throwing shoulder injury Throwing side Ultrasonography capsular tear case series dislocation subluxation traumatic anterior shoulder instability