Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath is again seen , terminating in the cavoatrial junction / proximal right atrium . The cardiac and mediastinal silhouettes are stable . Previously seen right base opacity has significantly decreased with possible minimal residual remaining . The left lung is clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Significant interval decrease in right base opacity with possible minimal residual remaining .