Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided central venous catheter tip projects over the upper SVC . Lower lung volumes seen on the current exam with secondary crowding of the bronchovascular markings . There is no confluent consolidation or large effusion . There is no pneumothorax . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
Left - sided central venous catheter tip projects over the upper SVC . No pneumothorax .