Pathologic M

This input is used for staging

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:
Note: M1 has subcategories of M1a, M1b and M1c. Assign M1 only when there is no information available to assign one of the subcategories.

Distant lymph nodes, NOS

Distant metastasis WITH or WITHOUT distant lymph node(s)

Distant metastasis, NOS

Size of metastasis not known or stated

Stated as M1 [NOS]
c1A cM1a Not defined by UICC* CLINICAL assessment only:
Largest diameter of the largest metastasis 3 cm or less

Stated as M1a
c1B cM1b Not defined by UICC* CLINICAL assessment only:
Largest diameter of the largest metastasis 3.1 - 8.0 cm

Stated as M1b
c1C cM1c Not defined by UICC* CLINICAL assessment only:
Largest diameter of the largest metastasis greater than 8 cm

Stated as M1c
p1 pM1 Distant metastasis HISTOLOGICALLY confirmed:
Note: M1 has subcategories of M1a, M1b and M1c. Assign M1 only when there is no information available to assign one of the subcategories.

Distant lymph nodes, NOS

Distant metastasis WITH or WITHOUT distant lymph node(s)

Distant metastasis, NOS

Size of metastasis not known or stated
p1A pM1a Not defined by UICC* HISTOLOGICALLY confirmed:
Largest diameter of the largest metastasis 3 cm or less
p1B pM1b Not defined by UICC* HISTOLOGICALLY confirmed:
Largest diameter of the largest metastasis 3.1 - 8.0 cm
p1C pM1c Not defined by UICC* HISTOLOGICALLY confirmed:
Largest diameter of the largest metastasis greater than 8 cm
88 88 Not applicable 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)
\* This subcategory of M1 is not defined in UICC 7th edition. Approval has been provided by UICC to use the definition from the AJCC 7th edition, which is documented in the registrar notes.