Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright radiograph of the chest demonstrates markedly low lung volumes with bibasilar atelectasis . There is a right chest wall Port - A - Cath terminating at the cavoatrial junction . There is no pneumothorax or right sided pleural effusion . A small left pleural effusion is not excluded . The mediastinal contours are normal . There is no evidence of intraperitoneal free air . There are erosive changes at the left distal clavicle . No subdiaphragmatic gas is seen .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Erosive process involving the left distal clavicle , new since ___ . Correlate clinically . 3 . No subdiaphragmatic gas seen .