Pathologic M

This input is used for staging

Notes

**Note:** Supraclavicular and transverse cervical lymph nodes are coded in regional lymph nodes because they are categorized as N rather than M in TNM.

NAACCR Item

NAACCR #900
Pathologic M Pathologic M Display Description Registrar Notes
c0 cM0 No distant metastasis Unknown, metastasis not stated
Distant metastasis cannot be assessed
Not documented in patient record
c1 cM1 Distant metastasis CLINICAL assessment only:
Distant lymph node(s):
Mediastinal (excluding superior mediastinal nodes)

Distant lymph node(s), NOS

Carcinomatosis
Distant metastasis WITH or WITHOUT distant lymph nodes

Distant metastasis, NOS

Stated as M1
p1 pM1 Distant metastasis HISTOLOGICALLY confirmed:
Distant lymph node(s):
Mediastinal (excluding superior mediastinal nodes)

Distant lymph node(s), NOS

Carcinomatosis
Distant metastasis WITH or WITHOUT distant lymph nodes

Distant metastasis, NOS
88 88 Not applicable Primary site/histology not TNM defined
In situ case but no pTis is defined by TNM
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)