EOD Primary Tumor
This input is used in derivation
Notes
**Note 1:** Parathyroid tumors are defined as left or right and superior (upper) or inferior (lower).
**Note 2:** Atypical parathyroid neoplasms (code 000) are defined as tumors that are histologically or clinically worrisome but do not fulfill the more robust criteria [i.e., invasion metastasis] for carcinoma.
Default
999
| Code |
Description |
SS2018 T |
| 000 |
In situ, intraepithelial, noninvasive |
IS |
| 050 |
Atypical parathyroid neoplasm
(neoplasm of uncertain malignant potential) |
IS |
| 100 |
Confined to parathyroid
Extension to soft tissue
Localized, NOS |
L |
| 200 |
Invasion into thyroid gland |
RE |
| 300 |
Adjacent lymph node(s)
Esophagus
Recurrent laryngeal nerve
Thymus
Trachea
Skeletal muscle |
RE |
| 700 |
Major blood vessels
Spine
Further contiguous extension |
D |
| 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) Landry, C.S., Wang, T.S., Perrier, N.D., et al. **Parathyroid**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 903-910
