Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , there is no significant change . There is atelectasis at the left lung base , similar to prior . There is no focal consolidation or pleural effusion . No pneumothorax . Mild cardiomegaly is unchanged . Again seen is a cortical break in the right fourth posterior rib . Bilateral nipple piercings are present .
    OUTPUT:
    
No pneumonia . Atelectasis of the lung left lung base , similar to prior .