Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart and great vessels are normal . The patient is rotated to the right . Increased fullness in the right superior paratracheal region from known superior mediastinal mass again seen , unchanged The lungs are clear of an active frozen well - expanded . There is no pleural effusion or pneumothorax . Since the previous exam the right PICC line has been removed .
    OUTPUT:
    
No evidence of pneumonia .