Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aorta is tortuous . Focal convexity inferior to the aortic arch at the level of the AP window could reflect a vascular structure such as a pseudoaneurysm , or other mediastinal mass . Hilar contours are otherwise unremarkable . Pulmonary vasculature is normal . Streaky opacities are seen within the retrocardiac region with tram tracking suggestive of bronchiectasis . No focal consolidation , pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are noted in the thoracic spine . Multiple old right - sided rib fractures are noted posteriorly .
    OUTPUT:
    
1 . Focal convexity inferior to the aortic arch at the level of the AP window may reflect a vascular structure or other mediastinal lesion , and further assessment with contrast - enhanced CT is recommended . 2 . Streaky opacities in the retrocardiac region which tracking suggestive of bronchiectasis .