Veil of obscuration sign (shoulder)
Veil of obscuration sign is a sign of posterior shoulder dislocation. It is generally seen on AP radiographs depicting a comminuted fracture of lesser tuberosity that projects over the glenohumeral joint giving rise to a "cloud-like" density or "veil of bone" density, which hides a posterior shoulder dislocation.
Epidemiology
Veil of obscuration sign seen in up to 40% of the patients who present with posterior shoulder dislocation 1.
Radiographic features
Plain radiograph
Fracture fragments of the lesser tuberosity are typically inferior and medially displaced, appear on plain radiographs as flat or disc-like shape.
CT
Lesser tuberosity fracture fragments are nicely seen on CT images with 2D and 3D reformats.