Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval decrease in size of the left pleural effusion which is now moderate in size with some decrease in the mediastinal shift . The heart is moderately enlarged but is now more appropriately placed within the thorax . There is a small drain in place projecting over the left lower lung . Right subclavian line tip is in the SVC . There is small right pleural effusion . There is right lower lobe volume loss / consolidation .
    OUTPUT:
    
Marked decrease in size of the left pleural effusion status post drainage .