Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views have been obtained with patient in upright position . There is mild cardiac enlargement . The presence of multiple surgical metallic clips mostly in the anterior mediastinal structures is indicative of previous bypass surgery and probably mammary artery anastomosis . The absence of sternotomy wire in this junction is remarkable and indicates the possibility of postoperative problems with sternotomy healing . Thoracic aorta is unremarkable and no evidence of local contour abnormalities is present . The pulmonary vasculature is not congested . No evidence for acute pneumonic infiltrates anywhere in the lungs . On the other hand , there is evidence of pleural thickenings , mostly on the right lung base and along the right lateral chest wall , indicative of old pleural scar formations . Minor scar formations exist also on the left base , but again no evidence of any acute infiltrate in the parenchyma is observed . The lateral and posterior pleural sinuses are free from any fluid accumulation . There is no pneumothorax in the apical area on the frontal view . Skeletal structures demonstrate an accentuated kyphotic curvature in the thoracic spine with moderate degree of degenerative changes in the form of bridging osteophytic reactions , mostly anteriorly to the vertebral bodies . Remarkable is also rather large depth diameter of the thorax . Our records do not include a previous chest examination available for comparison .
    OUTPUT:
    
Status post bypass surgery , no evidence of acute pulmonary congestion , no signs of acute pulmonary infiltrates . Pleural thickenings on the bases , more on the right than the left . Absence of sternotomy wires is remarkable . Correlate these findings to clinical manifestations and history . If previous chest examinations from other institutions can be identified , a comparison might be of value .