- NOTE: Obvious metastasis that is based on clinical evaluation includes any or all of the following: positive cytology of pleura, pericardium, or peritoneum; metastasis to brain, bone, lung, liver, or adrenals; positive biopsy or cytology of metastasis to supraclavicular lymph nodes; and involvement of the tracheobronchial tree (positive bronchoscopic biopsy or overt esophago-respiratory fistula).