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/)
* 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*
| 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
