Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal retrocardiac opacity is only seen on frontal projection and most consistent with atelectasis . The lungs are otherwise well inflated and clear with a stable 5 mm left lower lobe calcified granuloma , unchanged since ___ . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable .
    OUTPUT:
    
1 . Stable 5 mm left lower lobe calcified granuloma 2 . Minimal retrocardiac atelectasis . No evidence of pneumonia .