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 AP single view portable chest examination of ___ and PA and lateral chest examination of ___ . Frontal view demonstrates unchanged mediastinal structures including mild cardiac enlargement . The left basal densities persist with a drainage catheter in place . Small amount of local pleural density remains , but no evidence of major pneumothorax . The amount of pleural density has not increased since the next preceding examination of ___ . The pulmonary vasculature is not congested . No new abnormalities in the right hemithorax . No significant mediastinal shift . Again as identified on several previous examinations , there are demineralized vertebral bodies mostly in the lower portion of the thoracic spine with one marked compression of the lowermost vertebral body , probably T12 as seen on the lateral view .
    OUTPUT:
    
Persistent small amount of pleural effusion in the presence of a drainage tube . No major pneumothorax . No new infiltrates .