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 chest examination of ___ . Heart size within normal limits . No typical configurational abnormality is seen . Unremarkable appearance of thoracic aorta and mediastinal structures . 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 evidence of pneumothorax in the apical area on frontal view . Skeletal structures of the thorax grossly unremarkable . In comparison with the previous examination , no significant interval change has occurred .
    OUTPUT:
    
Stable findings , no evidence of acute infiltrates or mass lesion within the thorax .