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** Celiac Pancreaticosplenic (pancreaticolienal) Splenic (lineal), NOS Splenic hilum Splenic artery Gastroepiploic (gastro-omental), left Suprapancreatic

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 nodes

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 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)