Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates at the SVC / right atrial junction , unchanged . Mild enlargement of the cardiac silhouette is unchanged . Mediastinal and hilar contours are similar . Pulmonary vasculature is not engorged . There has been interval development of a small left pleural effusion with patchy left lower lobe opacity , potentially compressive atelectasis , though infection is not excluded . The right lung is grossly clear . No pneumothorax is present . There is no subdiaphragmatic free air . Clips from prior cholecystectomy are noted in the right upper quadrant of the abdomen . Known osseous metastatic disease is better seen on the previous CT .
    OUTPUT:
    
Small left pleural effusion and left lower lobe opacity , likely atelectasis , though infection is not excluded . No subdiaphragmatic free air .