Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The proximal end of the left PICC line is seen approaching the left chest cage , however , the distal end of the PICC line is not clearly visualized within the chest cavity and as such , placement can not be assessed . The mediastinal silhouette , hilar contours , and pleural surfaces are normal . No pneumonia or pneumothorax .
    OUTPUT:
    
The left PICC line is seen approaching the left chest cage , however , the distal end of the PICC line is not clearly visualized within the chest cavity , and placement can not be assessed .