Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there is persistence of a very small pneumothorax at the left apex , which remains unchanged . Bibasilar atelectasis is unchanged . Several small pulmonary nodules are again visualized . No new focal consolidations are identified . There is redemonstration of free intra-abdominal air , likely related to prior abdominal surgery .
    OUTPUT:
    
Unchanged small left apical pneumothorax .