Table 5.
Pathology findings
| Microscopic feature | Number (n = 20) |
|---|---|
| Invasion | |
| Bone invasion by histology | 9 |
| Lymphovascular invasion | 6 |
| Perineural invasion | 3 |
| Desmoplastic response to invasion | 12 |
| Architecture disorder | 20 |
| Keratin pearls | 12 |
| Paradoxical maturation | 14 |
| Dyskeratosis | 17 |
| Mucocytes or microabscess | 6 |
| Epithelial to stroma ratio (quartile) | |
| 1st | 2 |
| 2nd | 1 |
| 3rd | 5 |
| 4th | 12 |
| Pleomorphism | |
| Mild | 2 |
| Moderate | 6 |
| Severe | 12 |
| Necrosis | 13 |
| Mitotic figures | |
| Mean (per 10 HPF) | 53 |
| Range | 3–280 |
| Atypical figures (present) | 19 |
| Carcinoma type | |
| Squamous cell carcinoma | 17 |
| Mucoepidermoid carcinoma | 2 |
| Sinonasal undifferentiated carcinoma | 1 |
| Carcinoma grade | |
| Low grade (grade 1) | 6 |
| Intermediate grade (grade 2) | 5 |
| High grade (grade 3) | 9 |
HPF High power field