Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Pigtail left chest tube has been repositioned . There is further decrease in left pleural effusion . Small residual left pneumothorax persists . Left mainstem bronchial stent noted . Right lung remains clear .
    OUTPUT:
    
Further decrease in left effusion . Small residual left pneumothorax .