Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small right apical pneumothorax is unchanged since ___ . There is a single right - sided chest tube with its tip reaching till the right apex . There are no lung opacities concerning for pneumonia or aspiration . There is no pleural effusion .
    OUTPUT:
    
Small right apical pneumothorax , unchanged since at least ___ .