Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased retrocardiac opacity compared to the prior exam . Left lower lung linear atelectasis and pleural thickening . Stable left apical pleural thickening . Stable left mid-lung sub - centimeter nodules . No focal consolidation to suggest pneumonia . No pulmonary edema , pneumothorax , or pleural effusion . Stable top - normal heart size . Stable slightly widened appearance of the mediastinum secondary to the neoesophagus . No acute osseous abnormality .
    OUTPUT:
    
1 . Increased retrocardiac opacity , which in the appropriate clinical setting may represent a pneumonia . 2 . Left lower lung linear atelectasis . 3 . Other findings , stable as above .