Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided chest tube is identified with tip projecting at the right lung apex . Moderate to large right - sided pneumothorax is now seen . On prior there had been subtle lucency at the right lung base and adjacent the mediastinum raising the possibility of a small pneumothorax at that time . No obvious mediastinal shift noted on this film which is rotated and limited by patient 's scoliosis . Left lung is grossly clear . No displaced fractures identified . Subcutaneous gas is seen primarily over the right chest wall .
    OUTPUT:
    
Right chest tube identified . Right - sided pneumothorax is larger , now moderate to large , previously not as clearly delineated .