| 0 |
**In situ, intraepithelial, noninvasive**
* CIN III (conjunctival intraepithelial neoplasia III)
* SIN III (squamous intraepithelial neoplasia III)
Tumor has not invaded through the conjunctival basement membrane |
| 1 |
**Localized only (localized, NOS)**
* Confined to conjunctiva, NOS WITH invasion of the conjunctival basement membrane
* Confined to one subsite of conjunctiva
- Bulbar conjunctiva
- Forniceal conjunctiva
- Palpebral conjunctiva
- Tarsal conjunctiva
* Invasion of Cornea (3, 6, 9, or 12 o'clock hours)
- Intraocular compartments
- Intraocular extension WITHOUT invasion of adjacent structures |
| 2 |
**Regional by direct extension only**
* More than one subsite of conjunctiva involved
* Adjacent extraocular extension
- Anterior eyelid lamella
- Caruncle
- Eyelid margin (lower and/or upper)
- Lacrimal punctum and canaliculi (lower and/or upper)
- Plica
- Posterior eyelid lamella
* Adjacent paranasal sinuses
* Bone, bone of orbit
* Orbit, NOS
* Orbital soft tissues WITHOUT bone invasion
* Sinus, NOS |
| 3 |
**Regional lymph node(s) involved only**
* Cervical, NOS
* Mandibular, NOS
- Submandibular (submaxillary)
* Parotid, NOS
- Infra-auricular
- Preauricular
* 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)
- Central nervous system
* Distant lymph node(s), NOS
* Distant metastasis, NOS
- Carcinomatosis
- Distant metastasis WITH or WITHOUT distant lymph node(s) |
| 9 |
Unknown if extension or metastasis |
