Collaborative Stage Data Set - Revised 08/07/2013 FINAL
| Code | Description | TNM 7 Map | TNM 6 Map | SS77 Map | SS2000 Map |
| 000 | No regional lymph node involvement | N0 | N0 | NONE | NONE |
| 100 | Regional lymph node(s): Duodenum: Duodenal Gastroduodenal Hepatic Infrapyloric (subpyloric) Pancreaticoduodenal Pyloric Jejunum or ileum: Superior mesenteric Mesenteric, NOS Ileocolic for terminal ileum Cecal (anterior, posterior, or retrocecal) | N1 | N1 | RN | RN |
| 200 | Regional lymph node(s) for duodenum primaries only: Pericholedochal (common bile duct) Superior mesenteric | N1 | N1 | D | RN |
| 300 | Regional lymph node(s), NOS | N1 | N1 | RN | RN |
| 400 | Stated as N1with no other information on regional lymph nodes | N1 | N1 | RN | RN |
| 800 | Lymph nodes, NOS | N1 | N1 | RN | RN |
| 999 | Unknown; regional lymph nodes not stated Regional lymph nodes cannot be assessed Not documented in patient record | NX | NX | U | U |