Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a moderate - sized , partially - loculated left pleural effusion . The left pigtail pleural catheter has been removed , and there may be a small loculated hydropneumothorax at the previous catheter site . Again seen is a left juxtahilar mass with left upper lobe collapse .
    OUTPUT:
    
Moderate , partially - loculated left pleural effusion , with possibly a small hydropneumothorax at the previous pigtail catheter site .