Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiomegaly and tortuous aorta are stable from prior exam . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Displaced fracture of the right sixth rib shows callus formation . There is a likely cortical interruption of the left ribs 7 and 8 at the lateral aspect . Mild left pleural effusion . No focal consolidation or pneumothorax is seen . Severe degenerative changes in the right shoulder . Borderline dilated large bowel at 6 .2 cm .
    OUTPUT:
    
1 . No suspicious lung masses . 2 . Left seventh and eighth ribs are likely fractured at the lateral aspect . If further evaluation is needed , a dedicated rib series would be the appropriate examination . 3 . Mild left pleural effusion might indeed be a sequela of the left rib fractures . 4 . Previously seen right sixth rib fracture shows evidence of healing .