Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Port - A - Cath resides over the right chest wall with catheter tip in the low SVC . Bilateral breast implants again noted . Left basal opacity likely represents atelectasis , the can not exclude pneumonia , slightly increased from prior . No large effusion or pneumothorax . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
Left basal atelectasis , difficult to exclude a superimposed pneumonia .