Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There is a large area of opacity projecting over the left mid-___-lower lung which is likely due ___ pleural effusion with overlying atelectasis , underlying consolidation is not excluded . The right lung is clear . There are no findings ___ suggest pneumothorax . The cardiac silhouette is not accurately assessed due ___ the left base opacity , although it is unlikely ___ be enlarged . Aortic knob calcification is seen . The mediastinum is not widened .
    OUTPUT:
    
Opacity projecting over the left mid-___-lower lung which may be due ___ pleural effusion and overlying atelectasis , underlying consolidation or neoplasm not excluded . Recommend followup ___ resolution . Dedicated PA and lateral views or chest CT may be helpful for further evaluation .