EOD Primary Tumor
Notes
**Note 1:** The orbital tissues are the support systems of the globe, confined to the space within the surrounding bony structure. The tissues include fat, striated and smooth muscle, fibroconnective, vascular, lymphoid, peripheral nerve, and optic nerve tissue.
**Note 2:** In situ (code 000) may be used only for non-sarcoma histologies coded to this site. Sarcomas do not present as in situ or noninvasive tumors.
| Code |
Description |
SS2018 T |
| 000 |
In situ: Noninvasive; intraepithelial |
IS |
| 100 |
Any size tumor confined to orbit
- No invasion of bony walls or globe
- Confined to orbit (including soft tissues)
- Localized, NOS |
L |
| 300 |
Invasion of
- Bony walls
- Orbital tissues (excluding orbit primary site)
Diffuse invasion of orbital tissue and bony walls |
RE |
| 400 |
Invasion of globe or periorbital structures, including:
- Adjacent paranasal sinuses
- Conjunctiva
- Cranium
- Globe |
RE |
| 700 |
Central nervous system
Eyelids
Nasal cavity
Temporal fossa
Further contiguous extension |
D |
| 800 |
No evidence of primary tumor |
U |
| 999 |
Unknown; extension not stated
Primary tumor cannot be assessed
Not documented in medical 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
(5) Dutton, J.J., Finger, P.T., et al. **Orbital Sarcoma**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017
