Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided Port - A - Cath tip sits in the lower portion of the SVC . The heart and mediastinal contours are within normal limits . The lungs are largely clear with only minimal atelectasis in the right base in accordance with a small right pleural effusion . There is no pneumothorax .
    OUTPUT:
    
Small right pleural effusion with associated atelectasis ; no pneumothorax .