Table 1. Carcinoma of conjunctiva primary tumor (T) stagea.
| Designation | Description | Comment |
|---|---|---|
| TX | Primary tumor cannot be assessed | |
| T0 | No evidence of primary tumor | |
| Tis | Carcinoma in situ | Would include lesser degrees of dysplasia collectively referred to as conjunctival intraepithelial squamous neoplasia |
| T1 | Squamous cell carcinoma 5 mm or less in greatest dimensions | T1 stage and beyond represent invasive cancer |
| T2 | Squamous cell carcinoma >5 mm in greatest dimension, without invasion of adjacent structures | Excludes carcinomas that invade cornea, eye, forniceal conjunctiva, tarsus, lacrimal punctum, canaliculi, plica, caruncle, anterior or posterior eyelid lamella, or eyelid margin |
| T3 | Squamous cell carcinoma invades adjacent structures but not orbit | Includes involvement of adjacent structures excluded in T2 |
| T4 | Squamous cell carcinoma invades orbit with or without further extension | |
| T4a | Squamous cell carcinoma invades bone | |
| T4c | Squamous cell carcinoma invades paranasal sinuses | |
| T4d | Squamous cell carcinoma invades brain |
a
Modified from AJCC Cancer Staging Manual.8