Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to radiographs from 1 day prior , right - sided pigtail catheter in similar position . Right lower lobe opacity has marginally increased and right - sided pleural effusion have not significantly changed . In retrospect , small apical right - sided pneumothorax is stable . Moderate cardiomegaly . The left lung is relatively clear . Mild biapical scarring .
    OUTPUT:
    
Marginal increase in right lower lobe opacity and stable right pleural effusion . In retrospect , small apical right - sided pneumothorax is unchanged .