Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left PICC line is in unchanged position . Tracheostomy tube is in unchanged position . The lung volume is small . Left perihilar opacity has worsened , likely worsening pneumonia . Left lower lobe atelectasis has improved . No pleural effusions or pneumothorax . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Left mid to lower lung pneumonia .