Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest ___ at 20 :54 are submitted .
    OUTPUT:
    
A left - sided pacer remains in place . The patient is status post median sternotomy with stably enlarged cardiac and mediastinal contours . No evidence of pulmonary edema , pneumonia , pleural effusions , or pneumothorax . A dense calcification is seen overlying the scapula which likely is musculoskeletal in etiology . Mild degenerative changes in the thoracic spine with mild wedging of a few of the lower thoracic vertebra . A portion of an abdominal aortic stent is seen on the lateral projection . Note is made of a hiatal hernia .