Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is complete opacification of the left hemithorax with mediastinal shift to the left . In addition , there is a right basilar and right upper lung opacity . There is no right - sided pleural effusion . There is no pneumothorax .
    OUTPUT:
    
1 . Complete opacification of the left hemithorax with mild mediastinal shift to the left , findings consistent with complete collapse of the left lung . 2 . Focal right upper lung opacity could represent infection , but neoplasm can not be excluded . 3 . Right basilar opacity , could represent infection / aspiration or atelectasis .