Sail Sign
1) 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 fracture
2)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)
A114954
