Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen left chest tube has been removed . There has been interval marked enlargement of the now large left pleural effusion . There is a small amount of remaining aerated left lung near the apex . There is significant rightward shift of mediastinal structures , also new . The right lung is relatively well aerated . Prominence of the right lung interstitium may relate to crowding of bronchovascular structures . No definite pulmonary vascular congestion seen in the right lung . No pneumothorax or right pleural effusion .
    OUTPUT:
    
Significant interval enlargement of the now large left hydrothorax . Minimal aeration of left lung near the apex . Significant new rightward shift of mediastinal structures . No pneumothorax identified .