Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate near total opacification of the left hemithorax , compatible with a large pleural effusion . The left lower lobe is completely collapsed . There is minimal aeration of the apical left upper lobe , in the left lung is otherwise atelectatic . The left pleural fusion exerts mass effect upon the mediastinum , with rightward shift of mediastinal structures . The left lung appears clear , without right pleural effusion or pneumothorax . Visualized upper abdomen is unremarkable . Surgical clips in the left axilla are consistent with previous axillary lymph node dissection .
    OUTPUT:
    
Large left pleural effusion near complete atelectasis of the left lung and evidence of mass effect with rightward shift of mediastinal structures . The findings are concerning for malignant pleural disease and have been more fully assessed by outside chest CT of earlier the same date .