Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are multi focal opacities most prominent in the left lower lobe , increased compared to ___ . Smaller opacities are also evident in the right upper lobe and left mid lung . Lung volume is low . Enlarged cardiac silhouette is similar to before . Bilateral pleural effusions are small . There is no pneumothorax .
    OUTPUT:
    
Increasing multifocal opacities , most confluent in the left lower lobe . In conjunction with prior CT of thoracic spine , these findings are concerning for worsening multifocal pneumonia .