Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Trapped right lung unchanged . Right - sided pleural effusion shows mild interval progression compared to the previous 2 radiographs . Chest drain projects over the medial aspect of the right hemithorax . Leftward mediastinal shift appears slightly increased compared to prior imaging . Increased vascular markings of the left lung of most likely physiological due to shunting . No left - sided airspace consolidation .
    OUTPUT:
    
Interval progression of the right - sided pleural effusion .