Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal in previously seen left - sided central venous catheter . There are low lung volumes . Left lower lobe opacity could be due to pneumonia and / or atelectasis . No large pleural effusion is seen . There is no pneumothorax . The cardiac and mediastinal silhouettes are grossly stable .
    OUTPUT:
    
Left lower lobe opacity could be due to pneumonia and / or atelectasis .