Fig. 2

MIP of CT Angiogram in a Axial and b Sagittal, demonstrates the posterior tracheal impression and narrowing (red dotted arrow) by the left pulmonary artery (yellow arrowhead in a). Position of esophagus is denoted by *. Enlarged thymus is noted anterior and lateral to the right atrial appendage, in the retrosternal location (white arrows in a and b) which is responsible for the prominent right heart border in Fig. 1a. c Coronal reconstruction demonstrates distal tracheal stenosis (Green Bracket). d Virtual bronchoscopy image reveals concave posterior margin and mucosal indentations of complete tracheal rings as ribbings (curved white arrow)