Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath is seen , distal tip of which may appears to project posteriorly and may actually terminate in the azygos vein . Left base opacity most likely represents atelectasis . No large pleural effusion is seen . There is no evidence of pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . There is a large amount of pneumoperitoneum .
    OUTPUT:
    
Large amount of pneumoperitoneum . Emergency Medicine team is aware at time of dictation , including Dr . ___ . Left - sided Port - A - Cath , distal tip appears to course posterior , and may terminate in the azygos vein rather than the SVC .