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Microscopic features of HPV + and HPV− metastasis from different anatomic sites
| Primary site | HPV+ | HPV− | ||||
|---|---|---|---|---|---|---|
| K | NK | Hyb | K | NK | Hyb | |
| Oral | 0 | 0 | 0 | 35 | 0 | 0 |
| Larynx/hypopharynx | 0 | 0 | 1 | 24 | 0 | 1 |
| Oropharynx | 0 | 21 | 1 | 6 | 0 | 4 |
K = keratinizing SCC, NK = non-keratinizing SCC, Hyb = hybrid carcinoma
