Pathologic M
This input is used for staging
Notes
**Distant lymph nodes** **All subsites** Common iliac External iliac Para-aortic Retroperitoneal Superior mesenteric Distant lymph nodes, NOS **Cecum (C180), Ascending colon (C182), Hepatic Flexure (C183), Transverse colon (C184)** Inferior mesentericNAACCR 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 | Metastasis confined to one organ (liver, lung, ovary, non-regional lymph nodes(s)) | CLINICAL assessment only: Metastasis limited to: Single distant lymph node chain Single distant organ except peritoneum Stated as M1a |
| c1B | cM1b | Metastasis in more than one organ or the peritoneum | CLINICAL assessment only: Metastasis to multiple distant lymph node chains, NOS Carcinomatosis Distant metastasis WITH distant lymph nodes Distant metastasis to more than one organ 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 | Metastasis confined to one organ (liver, lung, ovary, non-regional lymph nodes(s)) | HISTOLOGICALLY confirmed: Metastasis limited to: Single distant lymph node chain Single distant organ except peritoneum Stated as M1a |
| p1B | pM1b | Metastasis in more than one organ or the peritoneum | HISTOLOGICALLY confirmed: Metastasis to multiple distant lymph node chains, NOS Carcinomatosis Distant metastasis WITH distant lymph nodes Distant metastasis to more than one organ WITH or WITHOUT distant lymph nodes |
| 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) |