Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Comparison is made with the next preceding similar study of ___ . The heart size remains unchanged and is within normal limits . Mild degree of aortic widening and elongation is present but no local contour abnormalities are seen . The pulmonary vasculature is not congested . No evidence of new acute parenchymal infiltrates can be identified . The pleural spaces are free laterally and posteriorly . No pneumothorax is present in the apical area on the frontal view . Review of multiple previous studies indicates that the patient had a left lower lobe atelectasis in retrocardiac position of ___ . Chest CT examination two days later demonstrated findings of bronchiectasis in this area compatible with chronic infection . There existed also multiple bilateral patchy confluent infiltrates which most likely represented GVHD in this patient who is undergoing stem cell transplant . As there is presently no evidence on the plain chest examination that the latter type of infiltrates persist in the area of the left lower lobe , a crowded vascular pattern with some interstitial prominent structures remain and most likely represent scar formations after the left lower lobe posterior segment pneumonia .
    OUTPUT:
    
No evidence of new acute infectious pneumonic infiltrates .