![Cary Squires, MD on X: "Yellow = apical cap, hemothorax, blue & purple = widened mediastinum and tracheal deviation due to traumatic aortic injury and mediastinal hemorrhage, red = thoracic spine distraction Cary Squires, MD on X: "Yellow = apical cap, hemothorax, blue & purple = widened mediastinum and tracheal deviation due to traumatic aortic injury and mediastinal hemorrhage, red = thoracic spine distraction](https://pbs.twimg.com/media/Eqpq1LwXUAExyec.jpg:large)
Cary Squires, MD on X: "Yellow = apical cap, hemothorax, blue & purple = widened mediastinum and tracheal deviation due to traumatic aortic injury and mediastinal hemorrhage, red = thoracic spine distraction
![Apical left extrapleural cap: an early and important sign on chest radiographs | Emergency Medicine Journal Apical left extrapleural cap: an early and important sign on chest radiographs | Emergency Medicine Journal](https://emj.bmj.com/content/emermed/25/12/819/F1.large.jpg)
Apical left extrapleural cap: an early and important sign on chest radiographs | Emergency Medicine Journal
![sufian_the_scribe on X: "Chest xray for thoracic aortic dissection Widened mediastinum (56-63%), abnormal aortic contour (48%), aortic knuckle double calcium sign >5mm (14%), pleural effusion (L>R), tracheal shift, left apical cap, deviated sufian_the_scribe on X: "Chest xray for thoracic aortic dissection Widened mediastinum (56-63%), abnormal aortic contour (48%), aortic knuckle double calcium sign >5mm (14%), pleural effusion (L>R), tracheal shift, left apical cap, deviated](https://pbs.twimg.com/media/DsCQjBkVsAAoiwL.jpg)
sufian_the_scribe on X: "Chest xray for thoracic aortic dissection Widened mediastinum (56-63%), abnormal aortic contour (48%), aortic knuckle double calcium sign >5mm (14%), pleural effusion (L>R), tracheal shift, left apical cap, deviated
UMEM Educational Pearls - University of Maryland School of Medicine, Department of Emergency Medicine
![Southwest Journal of Pulmonary, Critical Care and Sleep - Imaging - Medical Image of the Week: Acute Aortic Dissection Southwest Journal of Pulmonary, Critical Care and Sleep - Imaging - Medical Image of the Week: Acute Aortic Dissection](http://www.swjpcc.com/storage/manuscripts/volume-8/issue-4-april-2014/039-14/039-14%20Figure%201.jpg?__SQUARESPACE_CACHEVERSION=1397484274905)