EOD Primary Tumor
Notes
**Note:** Connective tissues large enough to be given a specific name are considered adjacent structures. For example, prevertebral fascia and jugular vein have names. Continuous tumor growth from one organ into an adjacent named structure is coded to regional.
| Code |
Description |
SS2018 T |
| 000 |
In situ, intraepithelial, noninvasive |
IS |
| 100 |
Confined to tissue or organ of origin
Localized, NOS |
L |
| 200 |
More than one region of pharynx involved
- Hypopharynx
- Nasopharynx
- Oropharynx
Pharynx and oral cavity involved
Extension to adjacent structure(s)
Fixation |
RE |
| 700 |
Further contiguous extension: |
D |
| 800 |
No evidence of primary tumor |
U |
| 999 |
Unknown; extension cannot be assessed
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)
