Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates at the cavoatrial junction . The cardiac , mediastinal and hilar contours are unchanged . There are several few nodules suggesting metastatic malignancy which are difficult to compare to the prior studies for small changes . An asymmetric opacity involving the left lung apex and suprahilar region suggests pneumonia superimposed on other findings . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Left upper lobe opacity suggesting pneumonia . Pulmonary nodules suggesting metastases , which are difficult to compare directly to prior studies .