Pathologic M

This input is used for staging

Notes

**Distant lymph nodes** Common iliac External iliac Superior mesenteric **Distant lymph nodes for rectosigmoid (C199)** Hemorrhoidal, inferior Internal iliac (hypogastric), NOS Obturator Rectal, inferior **Distant lymph nodes for rectum (C209)** Left colic **Distant metastasis** Ovary(ies) **Distant metastasis for rectosigmoid (C199)** Skeletal muscles of pelvic floor Vagina **Distant metastasis for rectum (C209)** Cervix Perineum, perianal skin Sacrum Sacral plexus

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 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

Distant lymph nodes, NOS

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

Distant lymph nodes, NOS
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)