EOD Primary Tumor

This input is used for staging

Default

999

NAACCR Item

NAACCR #772

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