Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Large left perihilar opacity is concerning for metastasis . Extensive bilateral pulmonary nodular opacities are concerning for diffuse metastatic lesions , difficult to exclude underlying edema . No large pleural effusion or pneumothorax . Heart size is difficult to assess . The imaged bony structures appear intact .
    OUTPUT:
    
Large left perihilar mass with extensive nodular opacities within both lungs concerning for metastasis . Difficult to exclude superimposed pulmonary edema .