Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an apparent increase in soft tissue density in the left axilla compared with the prior study . The left chest single - lead pacemaker remains in place , with its lead positioned at the level of the ventricles . There is left basilar opacity . The remainder of the lungs are clear . There is no definite pleural effusion . There is no pneumothorax . The cardiac silhouette remains moderately enlarged . Note is made of mitral annular calcifications . The mediastinal contours are notable for calcification of the aortic arch . Pulmonary vasculature is normal . Surgical clips are noted in the right upper quadrant .
    OUTPUT:
    
1 . Left basal opacity , likely atelectasis , can not exclude pneumonia . 2 . Apparent increase in soft tissue in the left axilla .