EOD Primary Tumor
Notes
**Note 1:** **Lacrimal Sac**
* The lacrimal sac is the upper dilated end of the nasolacrimal duct, lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla.
* The sac connects the lacrimal canaliculi, which drain tears from the eye's surface, and the nasolacrimal duct, which conveys this fluid into the nasal cavity.
* The most common epithelial tumors of the lacrimal sac are squamous cell and transitional cell carcinomas.
**Note 2:** **Periosteum**
* Periosteum is a fibrous membrane that wraps the outer surface of bones.
| Code |
Description |
SS2018 T |
| 000 |
In situ: Noninvasive; intraepithelial |
IS |
| 100 |
Confined to lacrimal sac
Localized, NOS |
L |
| 200 |
Adjacent bone
Globe (eyeball)
Optic nerve
Orbital soft tissues
Periosteum |
RE |
| 700 |
Adjacent structures, NOS
Brain
Pterygoid fossa
Sinus
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)
