Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A moderate to large left pneumothorax is evident . There are no signs of tension . Left subclavian central venous catheter remains in place terminating at the proximal SVC . The remainder of the exam is unchanged from the prior radiograph . Stable left base opacity .
    OUTPUT:
    
Moderate to large eft - sided pneumothorax without signs of tension .