Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right pectoral infusion port terminates at mid SVC . Multiple pulmonary nodules are similar compared to ___ . Opacity in the retrocardiac region on lateral view which may be due to atelectasis however pneumonia is possible . There is no pleural effusion , or pneumothorax . Cardiomediastinal and hilar silhouettes are normal size .
    OUTPUT:
    
Retrocardiac pulmonary opacity may be due to atelectasis , however pneumonia is possible .