Summary Stage 2018: Thymus

Summary Stage 2018

Notes

**Thymus** 8000-8700, 8720-8790, 9700-9701 C379 C379 Thymus **Note 1:** The following sources were used in the development of this chapter * SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998) (https://seer.cancer.gov/archive/manuals/EOD10Dig.3rd.pdf) * SEER Summary Staging Manual-2000: Codes and Coding Instructions (https://seer.cancer.gov/tools/ssm/ssm2000/) * Collaborative Stage Data Collection System, version 02.05: https://cancerstaging.org/cstage/Pages/default.aspx * Chapter 35 *Thymus*, in the AJCC Cancer Staging Manual, Eighth Edition (2017) published by Springer International Publishing. Used with permission of the American College of Surgeons, Chicago, Illinois. **Note 2:** See the following chapters for the listed histologies * 8710-8714, 8800-8934, 8940-9137, 9141-9582: *Soft Tissue* * 8935-8936: *GIST* * 9140: *Kaposi Sarcoma*

NAACCR Item

NAACCR #764
SS2018 Description
0 In situ: noninvasive, intraepithelial
1 Localized only (localized, NOS) - Confined to thymus, NOS - No mediastinal or pleura involvement or UNKNOWN if involved
2 Regional by direct extension only - Brachiocephalic vein - Chest wall - Confined to thymus WITH mediastinal or pleural involvement - Direct invasion of pericardium - Extrapericardial pulmonary artery or vein - Lung - Phrenic nerve - Superior vena cava
3 Regional lymph node(s) involved only - Ascending aorta - Cervical (low anterior) - Hilar - Internal mammary - Lower jugular - Mediastinal (lower, middle, NOS) - Para-aortic - Paratracheal (lower, upper, NOS) - Peri-thymic - Peri-thyroid - Pericardial - Phrenic (inferior, superior) - Precricoid/delphian - Pretracheal - Prevascular - Subaortic/aortopulmonary window - Subcarinal - Supraclavicular/venous angle: confluence of internal jugular and subclavian vein - Regional lymph node(s), NOS + Lymph node(s), NOS
4 Regional by BOTH direct extension AND regional lymph node(s) involved - Codes (2) + (3)
7 Distant site(s)/lymph node(s) involved - Distant site(s) (including further contiguous extension) + Extrathoracic sites + Separate pleural or pericardial nodule(s) - Distant lymph node(s), NOS - Distant metastasis, NOS + Carcinomatosis + Distant metastasis WITH or WITHOUT distant lymph node(s) * OR with pleural or pericardial nodule(s) metastasis
9 Unknown if extension or metastasis
(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) 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: 423-429