Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bedside AP radiograph of the chest demonstrates interval removal of the small pleural catheter . There remains a substantial pneumothorax , particularly in the upper right hemithorax , although some of the air in the middle and lower hemithorax has been replaced , likely by fluid . The near total opacification of the right hemithorax and extensive opacities in the left lung are a result of extensive tumor infiltration and unchanged . Mild rightward tracheal shift is unchanged . There is no left - sided pneumothorax or pleural effusion .
    OUTPUT:
    
Persistence of right pneumothorax with slight decrease in size or redistribution .