EOD Primary Tumor

Code Description SS2018 T
000 In situ, intraepithelial, noninvasive IS
100 Single invasive tumor confined/limited to thyroid Multiple foci confined/limited to thyroid Into thyroid capsule, but not beyond Confined/limited to thyroid, NOS Localized, NOS L
200 Gross extrathyroidal extension invading - Pericapsular soft tissue/connective tissue - Strap muscle(s) + Omohyoid + Sternohyoid + Sternothyroid + Thyrohyoid RE
300 Moderately advanced disease WITH gross extrathyroidal extension invading - Cricoid cartilage - Esophagus - Larynx - Parathyroid - Recurrent laryngeal nerve - Sternocleidomastoid muscle - Subcutaneous soft tissues - Trachea - Vagus nerve RE
600 Very advanced disease invading - Blood vessel(s) (major) + Carotid artery (encased) + Jugular vein + Thyroid artery or vein - Thyroid cartilage - Tumor described as "FIXED to adjacent tissues" RE
700 Very advanced disease invading - Bone - Mediastinal tissues - Prevertebral fascia - Skeletal muscle, other than strap or sternocleidomastoid muscle Further contiguous extension D
750 Advanced disease, NOS RE
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) Rosen, J.E., Lloyd, R.V., Perrier, N.D., et al. **Thyroid - Medullary**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 891-901