Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild right middle lobe and left lower lobe atelectasis . No pneumonia . No pulmonary edema . The aorta is torturous and once again visualized is a aneurysmal dilation of thoracic aorta measuring 4 .6 cm , previously measuring 4 .3 cm , best seen on lateral view . Patient is status post abdominal aortic stenting . Top - normal size of cardiac silhouette . No pleural effusions . No pneumothorax . Stable chronic compression fractures and multiple chronic rib fractures consistent with history of multiple myeloma .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Slight enlargement of thoracic aorta dilation , now measuring 4 .6 cm . 3 . Stable compression fractures and chronic rib fractures consistent with history of multiple myeloma .