Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior study , there is little difference in the retrocardiac atelectasis . No focal consolidations . Granuloma is noted in the left upper hemi thorax . Cardiac size is top normal . No pneumothorax . No evidence of free air . Deviated trachea is likely from an enlarged thyroid .
    OUTPUT:
    
Retrocardiac atelectasis . No focal consolidations concerning for pneumonia .