Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . There is no pulmonary edema . Patchy opacity in the left lung base may reflect pneumonia . There is no pleural effusion or pneumothorax . No acute osseous abnormalities seen .
    OUTPUT:
    
New patchy opacity in left lung base may reflect pneumonia .