Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with the study of ___ , there has been a left upper lobectomy with relatively small pneumothorax . Chest tube is in place . Small amount of gas is seen in the subcutaneous tissues along the left lateral chest wall . Minimal atelectatic changes are seen at the bases . Of incidental note is a small opacification inferior to the glenoid on the left , representing either a previous avulsion or calcific tendinosis in the subscapularis .
    OUTPUT:
    
Small left pneumothorax following left upper lobectomy .