Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large region of consolidation involving the left lung , involving the upper lobes , lingula , and possibly the left lower lobe , significantly increased since the prior study . Patchy right basilar opacity may represent atelectasis or additional site of consolidation . Additional subtle opacity projecting over the right upper lobe , in the region of the posterior right ___ rib , may be additional site of consolidation . No pleural effusion or pneumothorax is seen . There are relatively low lung volumes . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Large left lung consolidation involving the left upper lobe , lingula , and possibly left lower lobe . Possible right lower lobe consolidation versus atelectasis . Additional subtle opacity projecting over the right upper lobe , in the region of the posterior right 4th rib , may be additional site of consolidation . Overall findings are most consistent with multifocal pneumonia .