Pathologic M
This input is used for staging
Notes
**Note:** The lesser sac of the peritoneum, or omental bursa, is the cavity in the abdomen formed by the lesser and greater omentum; the pancreas forms part of the posterior wall of the lesser sac. **Distant lymph nodes** Pericholedochal (common bile duct) Pyloric Infrapyloric Retropyloric Subpyloric Suprapyloric Porta hepatic nodes Superior mesenteric (see N[regional lymph nodes] for mesenteric, NOS)NAACCR 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: Distant lymph nodes, NOS Seeding of peritoneum, even if limited to the lesser sac region Positive peritoneal cytology Carcinomatosis Distant metastasis WITH or WITHOUT distant lymph node(s) Distant metastasis, NOS Stated as M1 |
| p1 | pM1 | Distant metastasis | HISTOLOGICALLY confirmed: Distant lymph nodes, NOS Seeding of peritoneum, even if limited to the lesser sac region Positive peritoneal cytology Carcinomatosis Distant metastasis WITH or WITHOUT distant lymph node(s) 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) |