Table 2. Definitions of TNM Occult Carcinomaa
| Stage | TNM | Description |
| aReprinted with permission from AJCC: Lung. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 253-70. | ||
| Occult carcinoma | TX, N0, M0 | TX = Primary tumor cannot be assessed, or tumor proven by the presence of malignant cells in sputum or bronchial washings but not visualized by imaging or bronchoscopy. |
| N0 = No regional lymph node metastasis. | ||
| M0 = No distant metastasis. | ||
