Pathologic M
This input is used for staging
Notes
**Note:** Most pleural and pericardial effusions with lung cancer are due to tumor. In a few patients, however, multiple cytopathologic examinations of pleural and/or pericardial fluid are negative for tumor, and the fluid is nonbloody and is not an exudate. * Where these elements and clinical judgment dictate that the effusion is not related to the tumor, the effusion should be excluded as a staging element and the tumor should be classified as M0 **Distant lymph nodes** CervicalNAACCR Item
NAACCR #900| Pathologic M | Pathologic M Display | Description | Registrar Notes |
|---|---|---|---|
| c0 | cM0 | No distant metastasis | Unknown; distant metastasis not stated Distant metastasis cannot be assessed Not documented in patient record |
| c1 | cM1 | Distant metastasis | CLINICAL assessment only: Note: M1 has subcategories of M1a and M1b. Assign M1 only when there is no information available to assign one of the subcategories Distant metastasis, NOS Stated as M1 [NOS] |
| c1A | cM1a | Separate tumor nodule(s) in a contralateral lobe; tumor with pleural nodules OR malignant pleural or pericardial effusion | CLINICAL assessment only: Extension to: Contralateral lung Contralateral main stem bronchus Malignant pericardial or pleural effusion (Ipsilateral, contralateral or bilateral lung) (see Note) Pleural tumor foci or nodules on contralateral lung Pleural tumor foci or nodules on the ipsilateral lung separate from direct invasion Separate tumor nodule(s) in contralateral lung Stated as M1a |
| c1B | cM1b | Distant metastasis | CLINICAL assessment only: Distant lymph nodes, NOS Distant metastasis: Abdominal organs Extension to: Skeletal muscle Sternum Skin of chest Separate lesion in chest wall or diaphragm Other distant metastasis plus any distant metastasis specified in M1a Carcinomatosis Distant metastases WITH or WITHOUT distant lymph nodes Stated as M1b |
| p1 | pM1 | Distant metastasis | HISTOLOGICALLY confirmed: Note: M1 has subcategories of M1a and M1b. Assign M1 only when there is no information available to assign one of the subcategories Distant metastasis, NOS |
| p1A | pM1a | Separate tumor nodule(s) in a contralateral lobe; tumor with pleural nodules OR malignant pleural or pericardial effusion | HISTOLOGICALLY confirmed: Extension to: Contralateral lung Contralateral main stem bronchus Malignant pericardial or pleural effusion (Ipsilateral, contralateral or bilateral lung) (see Note) Pleural tumor foci or nodules on contralateral lung Pleural tumor foci or nodules on the ipsilateral lung separate from direct invasion Separate tumor nodule(s) in contralateral lung |
| p1B | pM1b | Distant metastasis | HISTOLOGICALLY confirmed: Distant lymph nodes, NOS Distant metastasis: Abdominal organs Extension to: Skeletal muscle Sternum Skin of chest Separate lesion in chest wall or diaphragm Other distant metastasis plus any distant metastasis specified in M1a Carcinomatosis Distant metastases WITH or WITHOUT distant lymph nodes Distant metastasis, NOS |
| 88 | 88 | Not applicable | Primary site/histology not TNM defined Death certificate only (DCO) case |
| <BLANK> | BLANK | See Registrar Notes | Pathologic classification criteria not met No pathologic workup for T and N categories and no pathologic evidence of metastasis Only Pathologic Stage Group documented (no T, N, or M information available) |