Table 2. High-Risk Features for Primary Tumor (T) Staging for Non-Eyelid Carcinoma
| aReprinted with permission from AJCC: Cutaneous squamous cell carcinoma and other cutaneous carcinomas. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 301-14. | |
| Depth/invasion | >2 mm thickness (Breslow thickness). |
| Clark level ≥IV. | |
| Perineural invasion. | |
| Anatomic | Primary site ear. |
| Location | Primary site hair-bearing lip. |
| Differentiation | Poorly differentiated or undifferentiated. |
