Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate a left - sided pneumothorax that is similar in size to prior . A left lower hemithorax chest tube is unchanged . There is , in addition the appearance of a left pleural effusion . The right lung is essentially clear .
    OUTPUT:
    
Persistent hydropneumothorax , however , no larger than prior , status post chest tube clamping .