Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right basal pigtail is in unchanged position . Small right apical pneumothorax measuring 2 cm is unchanged since ___ . There is no left - sided pneumothorax . Right residual mild - to - moderate pleural effusion with compressive atelectasis is stable . Left plate - like atelectasis at the lung base is also unchanged .
    OUTPUT:
    
There is no significant change since prior exam . Small right apical residual pneumothorax is measuring 2 cm .