Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright chest radiograph demonstrates moderate to large left pleural effusion , similar in size to the prior study from ___ , given different degrees of inspiration . The right lung is essentially clear with mild scarring at the right lung apex . Right - sided PleurX catheter is unchanged in location . Right chest wall port catheter terminates in the upper right atrium . Heart size is stable .
    OUTPUT:
    
1 . Moderate to large left pleural effusion with adjacent compressive atelectasis . This could obscure an underlying pneumonia . 2 . Stable location of right - sided pleural catheter and right chest wall port .