Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tiny left apical pneumothorax is unchanged . Opacity left lower lobe corresponds to a known hemothorax in the left lower lobe contusion . Cardiomegaly is stable . The aortic knob is calcified . Multiple rib fractures are better characterized on the prior CT chest .
    OUTPUT:
    
Tiny left apical pneumothorax is unchanged .