EOD Regional Nodes
This input is used for staging
Notes
**Note 1:** **Regional nodes and nodes, NOS** * Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in EOD Mets. **Note 2:** **LAMN tumors** * Nodal metastasis is very rare in low-grade appendiceal neoplasms (LAMN). If there is no mention of lymph nodes in the pathology report for a LAMN, code as none (000). **Note 3:** **CLINICAL and PATHOLOGICAL codes** * This schema has lymph node codes that are defined as **CLINICAL** assessment only or **PATHOLOGICAL** assessment only. * **PATHOLOGICAL** assessment only code (300) is used when * Any microscopic examination of regional lymph nodes, includes * FNA, core biopsy, sentinel node biopsy or lymph node excision done during the clinical work up **AND/OR** * Lymph node dissection performed * Pathological code 300 takes priority over codes 450-700, 800 * **CLINICAL** assessment only codes (450-700) are used when the **only** information on nodal involvement is based on **physical exam or imaging** * These codes are specifically for when there is no **microscopic confirmation** of regional lymph nodes (*Regional Nodes Positive = 98, 99*) * **Note:** Use code 300 if *Regional Nodes Positive is 01-90, 95* * Remaining codes (no designation of **CLINICAL** or **PATHOLOGICAL** only assessment) can be used based on clinical and/or pathological information * **Code 000** is used when there is no evidence of regional lymph nodes clinically **OR** lymph nodes are negative pathologically (*Regional Nodes Positive = 00, 98*) * **Code 800** is used when there are positive nodes (clinical or pathological), but the specific lymph nodes or number of positive nodes is unknown (*Regional Nodes Positive = 97*) * **Code 999** is used when the lymph node status is unknown and *Regional Nodes Positive = 99* **Note 4:** **Tumor Deposits** * Code 400 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 300Default
999NAACCR Item
NAACCR #774| Code | Description | SS2018 N |
|---|---|---|
| 000 | No regional lymph node involvement | NONE |
| 300 | **PATHOLOGICAL ASSESSMENT ONLY** - Cecal + Anterior (prececal) * Posterior (retrocecal) * Right colic - Colic, NOS - Epicolic (adjacent to bowel wall) - Ileocolic - Mesenteric, NOS - Mesocolic, NOS - Paracolic/pericolic | RN |
| 400 | **PATHOLOGICAL ASSESSMENT ONLY** Tumor deposits (TD) in the subserosa, mesentery, mesorectal or nonperitonealized pericolic or perirectal tissues WITHOUT regional nodal metastasis | RN |
| 450 | **CLINICAL ASSESSMENT ONLY** One positive node clinically OR Stated as Clinical N1a | RN |
| 500 | **CLINICAL ASSESSMENT ONLY** Two-three positive nodes clinically OR Stated as Clinical N1b | RN |
| 550 | **CLINICAL ASSESSMENT ONLY** Stated as Clinical N1, number of positive nodes clinically unknown | RN |
| 600 | **CLINICAL ASSESSMENT ONLY** Four-six positive nodes clinically OR Stated as Clinical N2a | RN |
| 650 | **CLINICAL ASSESSMENT ONLY** Seven or more positive nodes clinically OR Stated as Clinical N2b | RN |
| 700 | **CLINICAL ASSESSMENT ONLY** Stated as Clinical N2, number of positive nodes clinically unknown | RN |
| 800 | Positive nodes, number unknown Unknown if clinical or pathological assessment Regional lymph node(s), NOS Lymph node(s), NOS | RN |
| 999 | Unknown; regional lymph node(s) not stated Regional lymph node(s) cannot be assessed Not documented in medical record Death Certificate Only | U |