Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen left Hickman catheter has been removed . No residual catheter tubing is seen . The cardiomediastinal silhouette and hila are normal . There is no pleural effusion or pneumothorax . There is mild left lower lobe atelectatic change .
    OUTPUT:
    
No pneumothorax . No residual catheter fragment .