Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild elevation of the left hemidiaphragm with overlying atelectasis . There are patchy opacities projecting over the posterior left upper lobe and left suprahilar region . The left hilum is slightly prominent . The right lung is clear . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal . The aorta is slightly tortuous .
    OUTPUT:
    
Patchy opacity projecting over the left upper lobe and left suprahilar region raise concern for underlying infection although with slight prominence of the left hilum and history of COPD , recommend comparison to any prior radiographs and followup to resolution to exclude an underlying neoplastic process .