Sail Sign1) Elbow X-ray-suggest an occult frature-with some imagination, we can see the shape of a spinnaker (sail)-it rise from the displacement of the fat pad around the elbow joint-in children : suggest supracondylar fracture of the humerus-in adult : suggest radial head fracture2)Chest X-ray-in adult : suggest left lower lobe collapse (cannot see left diaphragm margin)-in children : at the mediastinum suggest thymus-->sharply demarcated triangle radiopacity (disappear on inspiration)A114...
