Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac size can not be evaluated . Large left pleural effusion is new . Small right effusion is new . The upper lungs are clear . Right lower lobe opacities are better seen in prior CT . There is no pneumothorax . There are mild degenerative changes in the thoracic spine
    OUTPUT:
    
Large left pleural effusion