Table 2 Baseline pathological characteristics of patients with head and neck adenoid cystic carcinoma.
| Characteristics | Total | |
|---|---|---|
| No. of patients | % | |
| Tumor size (cm) (n = 32) | ||
| ≤ 3 cm | 14 | 43.8 |
| > 3 cm | 18 | 56.2 |
| Histological growth pattern | ||
| Tubular | 7 | 18.9 |
| Cribriform | 23 | 62.2 |
| Solid | 7 | 18.9 |
| Histological grade | ||
| Well | 6 | 16.2 |
| Moderately | 21 | 56.8 |
| Poorly | 10 | 27.0 |
| Perineural invasion (n = 34) | ||
| Positive | 26 | 76.5 |
| Negative | 8 | 23.5 |
| Perivascular invasion (n = 35) | ||
| Positive | 4 | 11.4 |
| Negative | 31 | 88.6 |
| Lymphatic invasion (n = 33) | ||
| Positive | 11 | 29.7 |
| Negative | 22 | 66.7 |