Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are relatively low with left greater than right bibasilar opacities which are likely secondary to atelectasis . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . There is a comminuted proximal left humerus fracture with suggestion of callus formation .
    OUTPUT:
    
Bibasilar opacities which are likely atelectasis . Comminuted proximal left humerus fracture , with suggestion of callus formation suggesting this is not acute but clinical correlation is suggested .