Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Innumerable pulmonary nodules are seen within the right and left lung . There is confluent opacity projecting over the region of the left hilum , most compatible with underlying tumor . The heart and mediastinal structures are within normal limits . Bilaterally , the pleural spaces are clear . There is no evidence of pneumothorax . The spine demonstrates thoracic levoscoliosis .
    OUTPUT:
    
Multiple pulmonary nodules as well as a dominant nodule within the left hilar region compatible with the patient 's known metastatic neoplasm , with likely a lung primary . Status post biopsy , there is no evidence of pneumothorax .