Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates in the right atrium . The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . A relatively dense nodule projects over the left upper lobe . This corresponds to a known nodule seen on previous chest CT without evidence for change ( small changes would be difficult to detect with radiography , however ) . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease . Nodule in the left upper lobe .