EOD Primary Tumor

Code Description SS2018 T
000 In situ, intraepithelial, noninvasive IS
100 Tumor less than or equal to 1 cm AND confined to - Intramucosal, NOS - Lamina propria (including in a polyp) - Mucosa, NOS - Muscularis mucosae (including in a polyp) - Submucosa (superficial invasion) (including in a polyp) Localized, NOS L
200 Tumor greater than 1 cm OR Invades muscularis propria Invasion of muscularis, NOS L
300 Invasion through muscularis propria Extension through wall, NOS Subserosal tissue/(sub)serosal fat invaded Transmural, NOS Wall, NOS L
500 Adjacent (connective) tissue(s), NOS (without serosal penetration) Fat, NOS Mesenteric fat Mesentery (adjacent loops of bowel) Nonperitonealized perimuscular tissue Retroperitoneum RE
600 Invasion of/through serosa (mesothelium) (tunica serosa) (visceral peritoneum) Abdominal wall Colon (including appendix) Other segments of the small intestine via serosa Retroperitoneum invaded greater than 2 cm in depth RE
700 Bladder Fallopian tube(s) Ovary(ies) Uterus Further contiguous extension D
800 No evidence of primary tumor U
999 Unknown; extension not stated Primary tumor 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) Woltering, E.A., Bergsland, E.K., et al. **Neuroendocrine Tumors of the Jejunum and Ileum**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017 (6) **Neuroendocrine Tumors of the Jejunum and Ileum**, from the AJCC Cancer Staging System Version 9 (2023). Used with permission of the American College of Surgeons, Chicago, Illinois.