Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is thickening of the right paratracheal stripe since ___ worrisome for mass lesion in a patient with known large retrosternal thyroid goiter . The lungs are well inflated and clear . No pleural effusion or pneumothorax . There is prominence of the mediastinum worrisome for an ascending aortic aneurysm . Heart size and hila are otherwise unremarkable . Evidence of prior cardiac surgery with intact median sternotomy wires and valve replacement . Subtle retrocardiac opacity is only seen on lateral projection is most consistent with degenerative changes as seen on CT from ___ .
    OUTPUT:
    
1 . Progression of right paratracheal stripe thickening since ___ is worrisome for mass lesion in a patient with known large retrosternal thyroid goiter . 2 . Prominence of the mediastinum is worrisome for an ascending aortic aneurysm . 3 . Subtle retrocardiac opacity only seen on lateral projection likely represents degenerative changes of thoracic spine . 4 . No acute cardiopulmonary process .