Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Widening of the upper mediastinum is chronic . Lung volumes are low . There is a patchy left lower lung opacity which is new from baseline . The right lung is clear . There is no pneumothorax or pleural effusion . Crowding of the bronchovascular structures is present without overt pulmonary edema . Cortical irregularity of the right proximal humeral neck appears to be present .
    OUTPUT:
    
1 . Left lower lung opacity which may represent atelectasis but infection can not be excluded in the appropriate clinical setting . 2 . Cortical irregularity of the right humeral neck . Clinical correlation is recommended and dedicated shoulder radiographs can be obtained if there is concern for fracture .