Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive multifocal parenchymal opacities have increased in the left lower lung , but are otherwise decreased in extent . There is a small left pleural effusion , slightly increased . There is no pneumothorax . The cardiomediastinal silhouette is stable . A right PICC terminates in the distal SVC .
    OUTPUT:
    
Interval increase in left lower lung pulmonary opacities . Persistent extensive opacities have otherwise slightly decreased . Findings may represent extensive pneumonia , metastatic disease , cryptogenic organizing pneumonia , or a combination of these entities .