What are seven plain film findings of aortic dissection?

1. Widened mediastinum
2. Thickened wall sign (>8 mm; normal wall is 2-3 mm)
3. Localized dilation of the aortic knob or proximal descending aorta
4. Displacement of the trachea
5. Medial displacement of the calcied tunica intima
6. Pleural effusion or hemothorax
7. Cardiomegaly