Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a Port - A - Cath in place terminating at the lower superior vena cava and stable volume loss of the left lung with a leftward mediastinal shift . There is recurrent opacification of the left lung similar to what was seen on ___ although not present on the more recent CT . This appearance is nonspecific but could be seen with a widespread pneumonia or obstruction . Given the short timeframe of onset , it is unlikely that the opacification primarily reflects any potential recurrent malignancy , although increasing obstruction due to a hilar malignancy is not excluded . There is also probably a new pleural effusion on the left . The right lung remains clear without pleural effusion .
    OUTPUT:
    
Recurrent opacification of the residual left lung concerning for superimposed acute infection or obstruction .