Clinical N

This input is used in derivation

Notes

**Note 1:** Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in M (distant metastasis). **Note 2:** Regional lymph node involvement is rare for GISTs, so that cases in which the nodal status is not associated clinically are classified as cN0 instead of cNX. **Regional lymph nodes for colon** **All colon sites** Colic [NOS] Epicolic (adjacent to bowel wall) Mesocolic [NOS] Mesenteric [NOS] Paracolic/pericolic **Cecum (C180)** Anterior (prececal), Cecal [NOS] Ileocolic Periappendiceal Posterior (retrocecal) Right colic **Ascending colon (C182)** Ileocolic Middle colic Right colic **Hepatic flexure (C183)** Middle colic Right colic **Transverse colon (C184)** Inferior mesenteric Left colic Middle colic Right colic **Splenic flexure (C185)** Inferior mesenteric Left colic Middle colic **Descending colon (C186)** Inferior mesenteric Left colic Sigmoid **Sigmoid colon (C187)** Inferior mesenteric Left colic Rectosigmoid Sigmoid Sigmoidal (sigmoid mesenteric) Superior hemorrhoidal Superior rectal

NAACCR Item

NAACCR #950

Clinical N	Clinical N Display	Description	Registrar Notes
cX	cNX	Regional lymph nodes cannot be assessed	Clinical classification criteria met, evaluation done: Physician unable to assess N Regional lymph node involvement cannot be determined or findings inconclusive Physician assigns cNX, no other information available to determine N
c0	cN0	No regional lymph node metastasis
c1	cN1	Regional lymph node metastasis	Nodule(s) or foci in pericolic fat/adjacent mesentery/mesocolic fat Regional lymph nodes, NOS Lymph nodes, NOS Stated as N1
88	88	Not applicable	In situ case but no pTis is defined by TNM
<BLANK>	BLANK	See Registrar Notes	Clinical classification criteria not met Clinical classification criteria met, evaluation done: No information about diagnostic workup Results not documented in record Tumor first detected on surgical resection (no clinical workup) Evidence of metastatic disease [(cM1) or (pM1)], no other workup Only Clinical Stage Group documented (no T, N, or M information available)