Table 2.
Histological diagnosis of patients.
| Histological diagnosis | n | % |
|---|---|---|
| Squamous cell carcinoma | ||
| SCC NOS/conventional nonkeratinizing | 174 | 11.84 |
| Conventional keratinizing | 1271 | 86.46 |
| Conventional exophytic keratinizing | 14 | 0.95 |
| Basaloid/papillary | 2 | 0.14 |
| Verrucous | 1 | 0.07 |
| Sarcomatoid | 4 | 0.27 |
| Undifferentiated carcinoma | 2 | 0.14 |
| Adenosquamous carcinoma | 2 | 0.14 |
| Differentiation | ||
| Well | 467 | 31.77 |
| Moderate | 818 | 55.65 |
| Poor | 185 | 12.59 |
| Lymphovascular invasion | 615 | 41.83 |
| Perineural invasion | 441 | 30 |
| Extracapsular spread | 244 | 16.6 |
| Bone invasion | 148 | 10.07 |
| Pathological T category | ||
| T1 | 182 | 12.38 |
| T2 | 1213 | 82.52 |
| T3 | 61 | 4.15 |
| T4 | 14 | 0.95 |
| Pathological N category | ||
| N0 | 855 | 58.16 |
| N1 | 422 | 28.71 |
| N2a | 119 | 8.1 |
| N2b | 57 | 3.88 |
| N2c | 17 | 1.16 |
| N3 | 0 | |
| Clinical stage | ||
| I/II | 1338 | 91.02 |
| III/IV | 132 | 8.98 |