Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Posterior spinal hardware is seen extending from the mid thoracic spine inferiorly . There has been recent left thoracotomy with reason removal of a left chest tube . Previously noted left pneumothorax has resolved . In this patient with known left hilar mass , there is persistent vague opacity in the left mid upper lung which may reflect known lung cancer . There is elevation of the left hemidiaphragm with probable small left effusion and left basal atelectasis . The right lung remains clear . Heart size can not be assessed . The mediastinal contour appear is similar to prior . Bony structures are grossly intact .
    OUTPUT:
    
Interval resolution of left pneumothorax with persistent left mid to upper lung opacity compatible with known malignancy . Interval elevation of the left hemidiaphragm with left basal atelectasis and small left effusion .