Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right upper lobe atelectasis is of unknown chronicity without older radiographs for comparison . If it is acute , it could be due to a mucus plug in the bronchus ; however , an obstructing mass is also possible , especially considering slight rounded contour and increased density of the right hilum . Minimal interstitial lung markings at lung bases , also of unknown chronicity , could reflect atelectasis or focal scarring / fibrosis . There is no pleural effusion or pneumothorax . Mediastinal and cardiac contours are unremarkable .
    OUTPUT:
    
Partial right upper lobe collapse of uncertain chronicity . A short - term followup chest x-ray is suggested during this hospitalization stay . If persistent , a chest CT would be recommended to exclude an obstructing malignancy mass . This was discussed with the medical team by Dr . ___ by telephone on ___ at ___ am .