Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Mild cardiac enlargement is present . No typical configurational abnormality is seen . The thoracic aorta is of ordinary dimension but demonstrates a mild degree of elongation . No local contour abnormalities are present . The pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present , and the lateral and posterior pleural sinuses are free . No pneumothorax in the apical area . Skeletal structures of the thorax grossly unremarkable and unchanged .
    OUTPUT:
    
Stable chest findings , cardiac enlargement but no evidence of pulmonary congestion or acute infiltrates .