Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aorta is tortuous . The pulmonary vascularity is not engorged . Multiple masses are demonstrated within the lung bases , the largest within the medial aspect of the right lung base measuring up to 3 .7 cm . No focal consolidation , pleural effusion or pneumothorax is seen . Streaky opacity within the right lung base likely reflects atelectasis . There is no pleural effusion or pneumothorax . No acute osseous abnormality is seen .
    OUTPUT:
    
Multiple masses in the lungs concerning for metastatic disease . A CT of the chest is recommended for further evaluation if no prior studies are available for comparison .