Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patchy lateral left lung base opacity is seen , which could relate to atelectasis and overlying soft tissue , underlying consolidation is not excluded . No focal consolidation is seen in the right lung . There is no pleural effusion or pneumothorax . The cardiac , mediastinal , and hilar contours are stable .
    OUTPUT:
    
Patchy lateral left base opacity could relate to atelectasis and overlying soft tissue however , underlying consolidation not excluded .