EOD Regional Nodes

Notes

**Note 1:** Code only regional nodes and nodes, NOS in this field. Distant nodes are coded in EOD Mets. **Note 2:** For Colon and Rectum ONLY, any unnamed nodes that are removed with a colon or rectal resection are presumed to be regional pericolic or perirectal lymph nodes and are included in the EOD Regional Nodes code 300 (pericolic for sites C180 - C189, C199 and perirectal for sites C199 or C209). This site-specific instruction applies only to colon and rectum tumors and was verified with subject matter experts. **Note 3:** Code 200 is defined as “PATHOLOGICAL assessment only.” This is used when * Primary tumor or site surgically resected with * Any positive microscopic examination of tumor deposits WITHOUT positive lymph nodes * If there are also positive lymph nodes, code 300

Code	Description	SS2018 N
000	No regional lymph node involvement and no tumor deposits (TD)	NONE
200	PATHOLOGICAL assessment only Tumor deposits (TD) in the subserosa, mesentery, mesorectal or nonperitonealized pericolic or perirectal tissues WITHOUT regional nodal metastasis	RN
300	All colon subsites (C180, C182-C189) - Colic, NOS - Epicolic (adjacent to bowel wall) - Mesenteric, NOS - Mesocolic, NOS - Paracolic - Pericolic Cecum (C180) - Cecal, NOS + Anterior cecal (prececal) + Posterior cecal (retrocecal) - Colic (right) - Ileocolic - Periappendiceal Ascending colon (C182) - Colic (middle-right branch, right) - Ileocolic Hepatic flexure (C183) - Colic (middle, right) - Ileocolic Transverse colon (C184) - Colic (middle) Splenic flexure (C185) - Colic (left, middle) - Mesenteric (inferior) Descending colon (C186) - Colic (left) - Mesenteric (inferior) - Sigmoid Sigmoid colon (C187) - Colic (left) - Mesenteric (inferior) - Rectal (superior) (hemorrhoidal) - Rectosigmoid - Sigmoid (sigmoidal) (sigmoid mesenteric) - Superior rectal (hemorrhoidal) Rectosigmoid (C199) - Hemorrhoidal (middle, superior) - Mesenteric (inferior) - Mesorectal - Pericolic - Perirectal - Rectal (middle, superior) - Sigmoid (mesenteric) Rectum (C209) - Hemorrhoidal (middle, superior) - Iliac (hypogastric, internal, obturator) (see EOD Mets for common, external, NOS) - Mesenteric (inferior) - Mesorectal - Perirectal - Rectal (inferior) - Sacral, NOS + Lateral sacral (laterosacral) + Middle sacral (promontorial) (Gerota's node) + Presacral - Sigmoidal (sigmoid mesenteric)	RN
800	Regional lymph node(s), NOS Lymph node(s), NOS	RN
999	Unknown; regional node(s) not stated Regional lymph node(s) cannot be assessed Not documented in medical record Death Certificate Only	U

(1) Fritz AG, Ries LAG (eds). **SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998)**, National Cancer Institute, NIH Pub. No. 98-2313, Bethesda, MD, 1998 (2) Young JL Jr, Roffers SD, Ries LAG, Fritz AG, Hurlbut AA (eds.). **SEER Summary Staging Manual-2000: Codes and Coding Instructions**, National Cancer Institute, NIH Pub. No. 01-4969, Bethesda, MD, 2001. (3) Collaborative Stage Work Group of the American Joint Committee on Cancer. **Collaborative Stage Data Collection System User Documentation and Coding Instructions, version 02.05**. American Joint Committee on Cancer (Chicago, IL) (4) Gress, D.M., Edge, S.B., Gershenwald, J.E., et al. **Principles of Cancer Staging**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017 (5) Jessup, J.M., Goldberg, R.M., et al. **Colon and Rectum**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017