Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are stable . A right cardiophrenic opacity slightly obscures the medial right hemidiaphragm appears chronic in unchanged since ___ . Mild cardiomegaly is stable . The mediastinal and hilar contours are normal . Interval development of a small left pleural effusion . The small right apical pneumothorax persistent . The right chest tube is intact and terminates in the right upper lung .
    OUTPUT:
    
Persistent right apical pneumothorax . Development of small left pleural effusion .