Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Mild cardiomegaly is noted with an aortic valve replacement noted . Lungs are clear without focal consolidation , large effusion or pneumothorax . No signs of congestion or edema . There is a pectus excavatum deformity of the sternum . The mediastinal contour is stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Mild cardiomegaly , otherwise unremarkable exam .