Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , there is slight increase in opacity at the right lung base , may represent scarring or atelectasis , however can not exclude pneumonia in the appropriate clinical setting . Chronic scarring at the left lung base is stable . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unchanged . Again seen are multiple lytic lesions seen in the proximal left humerus , and myelomatous changes of multiple right - sided ribs .
    OUTPUT:
    
Slight increase in opacity at the right lung base compared with prior , may represent chronic scarring or atelectasis , however pneumonia should be considered in the appropriate clinical setting .