EOD Regional Nodes
This input is used in derivation
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:** **Hepatoduodenal and Pancreaticoduodenal lymph nodes** * Per AJCC, Hepatoduodenal nodes are regional for **all subsites** of the stomach. Previously they were regional only for the lesser curvature and the greater curvature. **Note 3:** **Metastatic nodules in the fat** * Metastatic nodules in the fat adjacent to a gastric carcinoma, without evidence of residual lymph node tissue, are classified as regional node metastases, but nodules implanted on peritoneal surfaces are classified as distant metastases (see EOD Mets). **Note 4:** **CLINICAL AND PATHOLOGICAL codes** * This schema has lymph node codes that are defined as **CLINICAL** assessment only or **PATHOLOGICAL** assessment only. **No surgical resection** * Use **CLINICAL** assessment only codes (400, 450, 500, 600, 700) when there is a clinical work up only and there is **NO surgical resection of the primary tumor or site** WITH * Any microscopic examination of regional lymph nodes, which includes FNA, core biopsy, sentinel node biopsy, lymph node excision, or lymph node dissection done during the clinical work up. **Surgical resection without neoadjuvant therapy** * Use **PATHOLOGICAL** assessment only codes (300) when there is a **surgical resection of the primary tumor or site** WITH * Any microscopic examination of regional lymph nodes, which includes FNA, core biopsy, sentinel node biopsy, lymph node excision done or lymph node dissection performed. **Surgical resection after neoadjuvant therapy** * If patient has neoadjuvant therapy, and the clinical assessment is equal to or greater than the pathological assessment, then the clinical assessment codes take priority. Otherwise, code the pathologic assessment. * See ***EOD 2018 General Instructions*** for further instructions on coding cases with neoadjuvant therapy, https://seer.cancer.gov/tools/staging/eod/.Default
999NAACCR Item
NAACCR #774| Code | Description | SS2018 N |
|---|---|---|
| 000 | No regional lymph node involvement | NONE |
| 300 | **PATHOLOGICAL ASSESSMENT ONLY** Celiac artery Common hepatic artery Hepatic, NOS Left gastric (superior gastric), NOS - Cardial, NOS - Cardioesophageal - Gastric artery - Gastric, left - Gastrohepatic - Gastropancreatic, left - Lesser curvature - Lesser omentum - Paracardial Pancreaticosplenic (pancreaticolineal) Perigastric, NOS Peripancreatic Pyloric, NOS - Infrapyloric (subpyloric) - Suprapyloric Right gastric (inferior gastric, NOS) - Gastrocolic - Gastroduodenal - Gastroepiploic (gastro-omental), right or NOS - Gastrohepatic - Greater curvature - Greater omentum - Pancreaticoduodenal Splenic (lineal), NOS - Gastroepiploic (gastro-omental), left - Splenic hilar/hilum Nodule(s) in perigastric fat | RN |
| 400 | **PATHOLOGICAL ASSESSMENT ONLY** Hepatoduodenal and Pancreaticoduodenal lymph nodes (See Note 2) * All subsites of stomach | D |
| 450 | **CLINICAL ASSESSMENT ONLY** One-two positive nodes clinically OR stated as Clinical N1 | RN |
| 500 | **CLINICAL ASSESSMENT ONLY** Three-six positive nodes clinically OR stated as Clinical N2 | RN |
| 600 | **CLINICAL ASSESSMENT ONLY** Seven to fifteen nodes clinically OR stated as Clinical N3 [NOS] OR N3a | RN |
| 700 | **CLINICAL ASSESSMENT ONLY** Fifteen nodes or greater clinically OR stated as Clinical N3b | 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 |