Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two views were obtained of the chest . Right mid lung chest tube is in unchanged position with a tiny right apical pneumothorax in a similar appearance to the previous examination from ___ with this area not well evaluated yesterday . Otherwise , the lungs are well expanded with blunting of the left costophrenic angle , which could be due to a small effusion or pleural thickening . Heart and mediastinal contours are unremarkable .
    OUTPUT:
    
Tiny right apical pneumothorax with chest tube on waterseal .