Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to ___ , a left - sided pigtail catheter has been placed . There has been essentially complete clearing of the previously seen left effusion . There is minimal underlying patchy opacity , possibly atelectasis . No pneumothorax is identified . The distribution and density of the opacity in the left upper / mid / lower zone is slightly different , but overall similar . Again seen is background hyperinflation / COPD , with extensive parenchymal scarring and extensive biapical pleural calcifications . The cardiomediastinal silhouette is partially obscured , but grossly unchanged . No definite superimposed CHF is identified . The right costophrenic sulcus is grossly clear , without evidence of right pleural effusion . Again noted is severe sigmoid scoliosis and clips over the left neck .
    OUTPUT:
    
Interval placement of pigtail catheter with essentially complete radiographic clearing of the left effusion . No pneumothorax detected . Extensive opacity in the left lung , corresponding to the extensive airspace consolidation / abscess on the ___ CT scan is slightly different in appearance , but overall similar . Right middle lobe consolidation seen on the recent CT is not well visualized radiographically . Severe background COPD , with dense apical calcifications again noted .