Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is streaky density in the right lung and at the left base consistent with scarring and or subsegmental atelectasis as before . There are increasing largely reticular opacities in the right . The right costophrenic sulcus is indistinct . The heart is rotated to the right , as on previous studies . Mediastinal structures are stable . There are multiple old upper right rib fractures as demonstrated previously . The shoulder prosthesis remains in place .
    OUTPUT:
    
Increasing density in the right lung most concerning for chronic or recurrent pneumonia .