Table 6. Primary Tumor (T) for Eyelid Carcinomaa
| aReprinted with permission from AJCC: Carcinoma of the Eyelid. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 523-6. | |
| TX | Primary tumor cannot be assessed. |
| T0 | No evidence of primary tumor. |
| Tis | Carcinoma in situ. |
| T1 | Tumor ≤5 mm in greatest dimension. |
| Not invading the tarsal plate or eyelid margin. | |
| T2a | Tumor >5 mm but not >10 mm in greatest dimension. |
| Or, any tumor that invades the tarsal plate or eyelid margin. | |
| T2b | Tumor >10 mm but not >20 mm in greatest dimension. |
| Or, involves full thickness eyelid. | |
| T3a | Tumor >20 mm in greatest dimension. |
| Or, any tumor that invades adjacent ocular or orbital structures. | |
| Any T with perineural tumor invasion. | |
| T3b | Complete tumor resection requires enucleation, exenteration, or bone resection. |
| T4 | Tumor is not resectable because of extensive invasion of ocular, orbital, craniofacial structures, or brain. |
