Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large left pleural effusion , new since ___ examination , obscuring the left hemidiaphragm and left cardiac border . The upper mediastinal border is within normal limits . The right lung volume is low . There is no right pleural effusion or right consolidation . There is no pneumothorax . The hepatic flexure is gas - filled , also seen on prior chest radiograph from ___ .
    OUTPUT:
    
New large left pleural effusion .