Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . There is persistent left pleural effusion with adjacent left lower lobe consolidation which has been seen on multiple prior imaging studies dating back to ___ . Difficult to exclude a superimposed pneumonia though overall appearance is unchanged . Right lung appears clear . Patient is left for rotated . Overall mediastinal contour appears grossly stable . Bony structures are intact .
    OUTPUT:
    
Persistent and chronic left pleural effusion and left lower lobe consolidation likely atelectasis though difficult to exclude pneumonia .