Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is leftward shift of mediastinal structures associated with volume loss in the lingula including dense opacification and air bronchograms . This appearance is very similar to prior examinations , however , and is associated with a large pulmonary mass in the left mid lung and associated atelectasis .
    OUTPUT:
    
Similar large left lingular mass with associated volume loss ; no significant change .