Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left PICC has been pulled back with the tip now projecting over the distal left brachiocephalic vein . There is otherwise no significant change from prior study with normal cardiomediastinal and hilar contours and clear lungs . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Migration of the left PICC now terminating in the distal left brachiocephalic vein .