Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in upright position . Comparison is made with the next previous available frontal chest examination of ___ . Heart size and mediastinal structures are unchanged . No pulmonary congestive pattern is seen . Scattered peripheral plate atelectases are seen bilaterally on the bases , and a suspicious local density in the central portion of the right lower lobe is present . There is no evidence of pneumothorax in the apical area on either side . Preceding chest examinations included CT and FDG scans identifying a suspicious malignancy in the right lower lobe .
    OUTPUT:
    
No evidence of pneumothorax status post mediastinoscopy .