Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left - sided chest tube appears unchanged . The cardiac , mediastinal and hilar contours appear stable . Patchy bilateral upper lobe opacities are not significantly changed . There is a barely detectable left apical pneumothorax as well as a small persistent left - sided pleural effusion . The chest appears hyperinflated .
    OUTPUT:
    
Trace pneumothorax at the left apex with in situ chest tube in unchanged position .