Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of the left - sided pigtail drainage catheter . Moderate to large left - sided pleural effusion is loculated and larger than on ___ . Opacification at the left lung base is unchanged from ___ . The right lung is well expanded and clear . Mediastinal contours , hila , and cardiac silhouette are stable from ___ . No pneumothorax .
    OUTPUT:
    
Moderate to large loculated left - sided pleural effusion is larger since ___ . Superinfection can not be excluded .