Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a small residual left apical pneumothorax . Retrocardiac atelectasis has slightly worsen . Loculated fluid in the right minor fissure is again seen . Left chest wall soft tissue emphysema is stable . Left hemidiaphragm remains elevated
    OUTPUT:
    
Small residual left apical pneumothorax .