Table 1. Demographic and clinicopathological data of 48 patients with second primary OSCC.
| Characteristic | No. of patients |
|---|---|
| Age | |
| ≥60 years | 25 |
| <60 years | 23 |
| Gender | |
| Male | 32 |
| Female | 16 |
| Drinker | |
| Yes | 7 |
| No | 41 |
| Smoker | |
| Yes | 12 |
| No | 36 |
| Tumor site | |
| Tongue | 18 |
| Gingiva | 10 |
| Buccal | 12 |
| Floor of mouth | 4 |
| Palate | 3 |
| Mandibular bone | 1 |
| Clinical stage | |
| I | 5 |
| II | 8 |
| III | 8 |
| IV | 27 |
| Tumor stage | |
| T1 | 6 |
| T2 | 10 |
| T3 | 6 |
| T4 | 26 |
| Status of lymph node | |
| N0 | 36 |
| N+ | 12 |
| Differentiation | |
| Well or moderate | 43 |
| Poor | 5 |
| Margin status | |
| Positive | 9 |
| Negative | 39 |
| Treatment mode | |
| Surgery only | 37 |
| Surgery + adjuvant therapy | 11 |
OSCC, oral squamous cell carcinoma.