Figure 2: Three-dimensional virtual reconstructed images showing a) right sided aortic arch (asterik) with four-vessel arch branching pattern having separate origins of left brachiocephalic trunk (1 ), right common carotid artery (2 ), right vertebral artery (3 ) and right subclavian artery (4 ). The MAPCAs are seen arising from the DTA (arrows). b) Sagittal image of the descending thoracic aorta showing the right-sided MAPCAs (C1, C2, C3 ) arising from the DTA, with aneurysmal dilatations along their course (arrows). c) Virtual bronchoscopy image at the level of bronchus intermedius showing bilateral, smooth extrinsic compression (arrows).