Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is the pigtail catheter at the left lung base . Also again seen is a small to moderate left effusion with underlying collapse and / or consolidation . Compared to the prior study , there is slightly less aeration in the retrocardiac region , but the overall appearance is otherwise similar . There is upper zone redistribution , with mild vascular plethora , without other evidence of CHF . There is minimal atelectasis the right lung base and possible minimal blunting of the right costophrenic angle . The cardiomediastinal silhouette is enlarged , but unchanged , with sternotomy wires noted . No pneumothorax detected .
    OUTPUT:
    
Small to moderate left pleural effusion , with underlying collapse and / or consolidation and left lung base pigtail catheter . Overall , the appearance is similar to ___ at 13 : ___ pm . However , the degree of aeration in the retrocardiac region is slightly decreased . Otherwise , I doubt significant interval change .