EOD Primary Tumor

Notes

**Note 1:** Intrahepatic vascular invasion is used synonymously with vascular invasion for tumors in codes 100-500 and includes gross and microscopic involvement (microvascular invasion) of vessels. **Note 2:** Multiple tumors include satellitosis, multifocal tumors, and intrahepatic metastasis.
Code Description SS2018 T
000 Intraepithelial, noninvasive IS
100 Any size tumor - Single lesion (one lobe) + WITHOUT or UNKNOWN vascular invasion Confined to liver, NOS Localized, NOS L
150 Code 100 WITH vascular invasion RE
200 Multiple (satellite) nodules/tumors confined to one lobe - WITH or WITHOUT vascular invasion L
300 Any size tumor - More than one lobe involved by contiguous growth (single lesion) + WITHOUT or UNKNOWN vascular invasion RE
400 Code 300 WITH vascular invasion RE
500 Multiple (satellite) nodules/tumors in more than one lobe of liver or on surface of parenchyma - WITH or WITHOUT vascular invasion RE
600 Diaphragm Extrahepatic bile duct(s) Extrahepatic blood vessel(s) - Hepatic artery - Portal vein - Vena cava Gallbladder Lesser omentum Ligament(s) - Coronary - Falciform - Hepatoduodenal - Hepatogastric - Round (of liver) - Triangular Peritoneum, NOS - Parietal - Visceral Major vascular invasion, NOS RE
700 Pancreas Pleura Stomach Further contiguous extension D
800 No evidence of primary tumor U
999 Unknown, extension not stated Primary tumor cannot be assessed Not documented in patient 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: 3-30 (5) Abou-Alfa, G.K., Pawlik, T.M., Vauthey, J.N., et al. **Liver**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 287-293