Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a retrocardiac consolidative opacity . No pleural effusion , pneumothorax , or pulmonary edema is seen . Heart and mediastinal contours are within normal limits .
    OUTPUT:
    
Left lower lobe pneumonia . Findings were reported to Dr . ___ by ___ by telephone at 23 :09 on ___ at the time of discovery of these findings .