Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The main pulmonary artery contour is again mildly enlarged . Mild enlargement of each hilum may be accounted for also by enlargement of central pulmonary arteries and perhaps mild lymph node enlargement , as seen previously , more striking on the right than eft . There is no pleural effusion or pneumothorax . The lungs appear clear . Mild degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
Findings similar to baseline including enlarged central pulmonary arteries and probably mild persistent prominence of bilateral hilar lymph nodes , especially on the right .