Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal upright view of the chest was obtained reportedly . A new right pigtail catheter overlies the right lower hemithorax . The right pneumothorax is improved and remains moderate in size . The fiducial in the right upper lobe mass is again seen . The left lung is clear without pneumothorax or effusion . Elevation of the left hemidiaphragm is unchanged since ___ . The mediastinum is more midline than on the prior study . Heart size is normal . A well - circumscribed density in the left glenoid is a bone island as seen on prior CT ___ .
    OUTPUT:
    
Improved but persistent moderate right pneumothorax after chest tube placement .