Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Minimal atelectasis is noted in the lung bases . No focal consolidation , pleural effusion or pneumothorax is present . Marked degenerative changes of the left glenohumeral joint are present . Left - sided VP shunt catheter is incompletely assessed .
    OUTPUT:
    
Mild bibasilar atelectasis . No focal consolidation to suggest pneumonia .