Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable marked enlargement of the heart with mild pulmonary vascular congestion without overt edema . Retrocardiac opacity with subtle air bronchograms could reflect left lower lobe pneumonia . Small left pleural effusion can not be excluded . There is no pneumothorax or right pleural effusion .
    OUTPUT:
    
Possible left lower lobe pneumonia . If clinical status permits , PA and lateral radiographs would allow for better evaluation . These findings were discussed with Dr . ___ by Dr . ___ at ___ on ___ by phone .