EOD Primary Tumor

Code Description SS2018 T
000 In situ: Noninvasive; intraepithelial IS
100 Confined to thymus (encapsulated tumor) OR Extending into the mediastinal fat WITHOUT mediastinal pleura/pleura involvement L
200 Confined to thymus (encapsulated tumor) WITH mediastinal pleura/pleural involvement RE
300 Confined to thymus, NOS Unknown if mediastinum or pleural involved L
400 Direct invasion of pericardium RE
500 Brachiocephalic vein Chest wall Extrapericardial pulmonary artery or vein Lung Phrenic nerve Superior vena cava RE
700 Aorta (ascending, arch, or descending) Arch vessels Esophagus Intrapericardial pulmonary artery Myocardium Trachea 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) Detterbeck, F.C., Marom, E.M. **Thymus**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017