Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is markedly asymmetric airspace opacity predominately affecting the left long . While this may reflect asymmetric pulmonary edema , infection can not be excluded . There is prominence of pulmonary vascular in the right lung consistent with pulmonary vascular congestion . No pneumothorax or pleural effusion seen .
    OUTPUT:
    
Extensive consolidation in the left lung may reflect asymmetric pulmonary edema but infection can not be excluded .