Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left mid to lower lung opacification now has a bulging contour . This likely represents a combination of dense atelectasis from collapse of superior segment of the lower lobe and small to moderate pleural effusion rather than loculated pleural effusion . The remaining left lung is clear without consolidation . The right lung is clear without consolidation . The hila and pulmonary vasculatures are grossly unchanged . No pneumothorax . The cardiomediastinal silhouette is unchanged . No fractures .
    OUTPUT:
    
The worsening left lung opacification likely represents a combination of dense atelectasis and small to moderate pleural effusion rather than loculated pleural effusion alone .