Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Listen basilar opacity in again noted compatible with a small to moderate effusion . Likely underlying atelectasis seen , consolidation not excluded . The right lung remains clear . Numerous surgical clips project over the right anterior chest wall . The cardiomediastinal silhouette is unchanged . Osseous and soft tissue structures demonstrate no acute abnormality .
    OUTPUT:
    
Small to moderate left effusion with likely associated atelectasis noting that consolidation is not excluded .