Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Heart size is normal . Mediastinal and hilar contours are unchanged . Large calcified granulomas in the right upper lobe as well as calcified lymph nodes within the mediastinum and hila bilaterally are compatible with prior granulomatous disease . There is interval development of a small left pleural effusion with left basilar opacification . Right lung is clear . No pneumothorax is identified . Pulmonary vasculature is normal . Multilevel degenerative changes are again seen within the imaged thoracic spine with several clips noted in the upper abdomen .
    OUTPUT:
    
New small left pleural effusion and left basilar opacification , potentially reflective of atelectasis or infection .