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 ___ . The heart size remains normal . No changes in mediastinal structures or appearance of thoracic aorta . The pulmonary vasculature is not congested . The previously identified rather well described nodular - appearing densities in the left lower lobe area remain . The same holds for an abnormal prominence in the lower portion of the left hilum . These lesions have not increased in size significantly . Detailed comparison , however , suggests that there is probably some development of new similar nodular densities highly above and to the left of the previously described lower lobe densities . Lateral view suggests that these new nodules are located in the left lower lobe posterior segment whereas the previously existing nodules are located mostly to the anterior portion of the lower lobe area . Comparison also reveals that no pleural effusion has developed on either side and no pneumothorax is present in the apical area . The right hemithorax remains entirely normal .
    OUTPUT:
    
Persistent nodular densities previously identified as representing rheumatoid nodules . Chest examination followup shows persistence of this lesion in rather unchanged appearance . Newly similar nodules have developed in left lower lobe posterior segment . They appear to be of same nature . Further clinical workup with chest CT required will depend on patient 's clinical presentation .